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Doug's Headers 1967-72 Chevy/GMC C/K Truck Small Block 1 5/8" TRI-Y Header D371Y

Doug's Headers 1967-72 Chevy/GMC C/K Truck Small Block 1 5/8" TRI-Y Header D371Y
Doug's Headers 1967-72 Chevy/GMC C/K Truck Small Block 1 5/8" TRI-Y Header D371YDoug's Headers 1967-72 Chevy/GMC C/K Truck Small Block 1 5/8" TRI-Y Header D371Y
from $1,609.37 st

Available Options

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Model: 5124743
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
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[More Info]
Doug's is the pioneering force behind the popular TRI-Y design for cars and trucks. The unique, shortend, paired primary tubes increase mid-range torque without sacrificing top end power. TRI-Y's are a great choice for daily drivers and heavy duty trucks looking to increase power from idle up to 4500 RPM while maintaining maximum fuel efficiency.
Features:
  • 3/8" thick machined flanges to prevent warping
  • CNC mandrel bent tubes ensure accurate fit and better flow
  • Heavy 16-guage tubing for longer life
  • Tubes are pre-polished to removed scratches before applying metallic ceramic or hi-temp black coating
About Doug's Headers

Doug's Headers are a fixture in the motorsports aftermarket, pioneering quality muscle car performance headers for decades. Unlike the competition, Doug's Headers prides ourselves on superior design detail resulting in a hassle-free installation for any application.

Downloads:

Download Name File Size
D371Y.pdf541.46KB
D371Y-B.pdf541.46KB

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Years Engine Fitment Notes
Chevrolet Blazer 1969 5.7L / 350 / V8
5.0L / 307 / V8		 Two Wheel Drive only.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Two wheel drive only.
Chevrolet Blazer 1970 5.7L / 350 / V8
5.0L / 307 / V8		 Two Wheel Drive only.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Two wheel drive only.
Chevrolet Blazer 1971 5.7L / 350 / V8
5.0L / 307 / V8		 Two Wheel Drive only.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Two wheel drive only.
Chevrolet Blazer 1972 5.7L / 350 / V8
5.0L / 307 / V8		 Two Wheel Drive only.
Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Two wheel drive only.
Chevrolet C10 Pickup 1967 5.3L / 327 / V8
4.6L / 283 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C10 Pickup 1968 5.4L / 327 / V8
5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C10 Pickup 1969 5.7L / 350 / V8
5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C10 Pickup 1970 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C10 Pickup 1971 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C10 Pickup 1972 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C10 Suburban 1967 4.6L / 283 / V8
5.3L / 327 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C10 Suburban 1968 5.4L / 327 / V8
5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C10 Suburban 1969 5.7L / 350 / V8
5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C10 Suburban 1970 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C10 Suburban 1971 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C10 Suburban 1972 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C20 Pickup 1967 5.3L / 327 / V8
4.6L / 283 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C20 Pickup 1968 5.4L / 327 / V8
5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C20 Pickup 1969 5.7L / 350 / V8
5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C20 Pickup 1970 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C20 Pickup 1971 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C20 Pickup 1972 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C20 Suburban 1967 4.6L / 283 / V8
5.3L / 327 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C20 Suburban 1968 5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C20 Suburban 1969 5.7L / 350 / V8
5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C20 Suburban 1970 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C20 Suburban 1971 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C20 Suburban 1972 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C30 Pickup 1967 5.3L / 327 / V8
4.6L / 283 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C30 Pickup 1968 5.4L / 327 / V8
5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C30 Pickup 1969 5.7L / 350 / V8
5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C30 Pickup 1970 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C30 Pickup 1971 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet C30 Pickup 1972 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet K10 Suburban 1967 5.3L / 327 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet K10 Suburban 1968 5.0L / 307 / V8
5.4L / 327 / V8
5.3L / 327 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet K10 Suburban 1969 5.0L / 307 / V8
5.3L / 327 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet K10 Suburban 1970 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet K10 Suburban 1971 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet K10 Suburban 1972 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet K20 Suburban 1967 5.3L / 327 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet K20 Suburban 1968 5.4L / 327 / V8
5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet K20 Suburban 1969 5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet K20 Suburban 1970 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet K20 Suburban 1971 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
Chevrolet K20 Suburban 1972 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C15/C1500 Pickup 1967 5.3L / 327 / V8
4.6L / 283 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C15/C1500 Pickup 1968 5.0L / 307 / V8
5.4L / 327 / V8
5.3L / 327 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C15/C1500 Pickup 1969 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C15/C1500 Pickup 1970 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C15/C1500 Pickup 1971 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C15/C1500 Pickup 1972 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C15/C1500 Suburban 1967 4.6L / 283 / V8
5.3L / 327 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C15/C1500 Suburban 1968 5.4L / 327 / V8
5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C15/C1500 Suburban 1969 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C15/C1500 Suburban 1970 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C15/C1500 Suburban 1971 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C15/C1500 Suburban 1972 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C25/C2500 Pickup 1967 5.3L / 327 / V8
4.6L / 283 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C25/C2500 Pickup 1968 5.0L / 307 / V8
5.4L / 327 / V8
5.3L / 327 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C25/C2500 Pickup 1969 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C25/C2500 Pickup 1970 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C25/C2500 Pickup 1971 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C25/C2500 Pickup 1972 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C25/C2500 Suburban 1967 4.6L / 283 / V8
5.3L / 327 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C25/C2500 Suburban 1968 5.4L / 327 / V8
5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C25/C2500 Suburban 1969 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C25/C2500 Suburban 1970 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C25/C2500 Suburban 1971 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C25/C2500 Suburban 1972 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C35/C3500 Pickup 1967 5.3L / 327 / V8
4.6L / 283 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C35/C3500 Pickup 1968 5.0L / 307 / V8
5.4L / 327 / V8
5.3L / 327 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C35/C3500 Pickup 1969 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C35/C3500 Pickup 1970 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C35/C3500 Pickup 1971 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC C35/C3500 Pickup 1972 5.7L / 350 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC Jimmy 1970 5.7L / 350 / V8
5.0L / 307 / V8		 Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Tri-Y
Two Wheel Drive Only.
Fits most angle plug heads.
Will not fit with column shift manual transmission.
GMC Jimmy 1971 5.7L / 350 / V8
5.0L / 307 / V8		 Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Tri-Y
Two Wheel Drive Only.
Fits most angle plug heads.
Will not fit with column shift manual transmission.
GMC Jimmy 1972 5.7L / 350 / V8
5.0L / 307 / V8		 Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Tri-Y
Two Wheel Drive Only.
Fits most angle plug heads.
Will not fit with column shift manual transmission.
GMC K15/K1500 Pickup 1967 4.6L / 283 / V8
5.3L / 327 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K15/K1500 Pickup 1968 5.0L / 307 / V8
5.4L / 327 / V8
5.3L / 327 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K15/K1500 Pickup 1969 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K15/K1500 Pickup 1970 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K15/K1500 Pickup 1971 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K15/K1500 Pickup 1972 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K15/K1500 Suburban 1967 5.3L / 327 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K15/K1500 Suburban 1968 5.0L / 307 / V8
5.4L / 327 / V8
5.3L / 327 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K15/K1500 Suburban 1969 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K15/K1500 Suburban 1970 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K15/K1500 Suburban 1971 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K15/K1500 Suburban 1972 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K25/K2500 Pickup 1967 4.6L / 283 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K25/K2500 Pickup 1968 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K25/K2500 Pickup 1969 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K25/K2500 Pickup 1970 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K25/K2500 Pickup 1971 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K25/K2500 Pickup 1972 5.0L / 307 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K25/K2500 Suburban 1967 5.3L / 327 / V8 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K25/K2500 Suburban 1968 5.0L / 307 / V8
5.4L / 327 / V8
5.3L / 327 / V8		 Fits most angle plug heads.
Tri-Y
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
GMC K25/K2500 Suburban 1969 5.0L / 307 / V8 Fits most angle plug heads.
Tri-Y
GMC K25/K2500 Suburban 1970 5.0L / 307 / V8 Fits most angle plug heads.
Tri-Y
GMC K25/K2500 Suburban 1971 5.0L / 307 / V8 Fits most angle plug heads.
Tri-Y
GMC K25/K2500 Suburban 1972 5.0L / 307 / V8 Fits most angle plug heads.
Tri-Y
GMC K35/K3500 Pickup 1968 5.4L / 327 / V8
5.3L / 327 / V8
5.0L / 307 / V8		 Fits most angle plug heads.
Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K35/K3500 Pickup 1969 5.0L / 307 / V8 Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K35/K3500 Pickup 1970 5.0L / 307 / V8 Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K35/K3500 Pickup 1971 5.0L / 307 / V8 Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y
GMC K35/K3500 Pickup 1972 5.0L / 307 / V8 Fits D-Port cylinder heads including ZZ4 crate engines. Will Not fit GM Fast Burn head PN 19300955 or SP350, SP383 & ZZ6 engines.
Better ground clearance than D372Y.
Does not fit 4 speed applications with Factory Side bell housing mounts.
Will not fit with column shift manual transmission.
Tri-Y

Specifications:

Collector Attachment 3-Bolt Flange
Collector Diameter 2.5 IN
Collector Port Diameter 2.5 IN
Cylinder Head Port Shape Oval
Design Tri-Y
Flange Thickness 0.375 IN
Gasket Or Seal Included Yes
Gaskets Included Yes
Grade Type Performance
Header Style Tri-Y
Mounting Hardware Included Yes
Oxygen Sensor Port No
Part Type Exhaust Header
Port Shape Oval
Primary Tube Outside Diameter 1.625 IN
Proposition 65 www.P65Warnings.ca.gov
Tube Wall Thickness 16 GU
Warranty Time 24 Months

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Doug's Headers 1967-72 Chevy/GMC C/K Truck Small Block 1 5/8" TRI-Y Header D371Y:
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