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FlowTech Shorty Headers, Black Painted 11143FLT

FlowTech Shorty Headers, Black Painted 11143FLT
FlowTech Shorty Headers, Black Painted 11143FLTFlowTech Shorty Headers, Black Painted 11143FLTFlowTech Shorty Headers, Black Painted 11143FLTFlowTech Shorty Headers, Black Painted 11143FLTFlowTech Shorty Headers, Black Painted 11143FLT
$802.99 ea
NEWARRIVING SOONEstimated Ship Date 06/04/2026 (If Ordered Today)31 Available from HOLLEY PERFORMANCE PRODUCTS as of 05/19/2026
Model: 4005888
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
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Flowtech Headers are the perfect combination of quality and value. This shorty style header is popular for "LS-Engine" swap projects. They fit the popular 03-13 Chevy Silverado/Tahoe/Yukon V-8 6.0L, 2WD/4WD.
Features:
  • Mandrel-bent tubes provide consistent tubing diameters for smooth flow and increased exhaust velocity
  • Heavy duty 16-gauge tubing for increased strength and durability
  • Smooth transition, 1-7/8” diameter primary tubes are used for increased exhaust flow increasing performance and improving throttle response
  • OE style 2-1/2” collector connects to factory exhaust head pipe with no cutting or welding
  • TIG-welded, machined 3/8” header flange for a leak-free seal and maximum strength
  • Premium aluminum header gaskets included
  • Coated in high heat resistant black paint
  • Headers are a must upgrade if you are using a cold air intake, cat-back exhaust system or tuner
Installation Notes:
For extra plug wire clearance on cylinder 6, use a 90 degree plug boot angle. See Accel part 170901C.

Downloads:

Download Name File Size
11143-3901flt.pdf174.17KB

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 Submodel Years Engine Fitment Notes
Chevrolet Silverado 1500 2003 6.0L / 364 / V8 4WD
Chevrolet Silverado 1500 2004 6.0L / 364 / V8 4WD
Chevrolet Silverado 1500 2005 6.0L / 364 / V8 4WD
Chevrolet Silverado 1500 2006 6.0L / 364 / V8 4WD
Chevrolet Silverado 1500 2007 6.0L / 364 / V8 4WD
Chevrolet Silverado 1500 2008 6.0L / 364 / V8 4WD
Chevrolet Silverado 1500 2009 6.0L / 364 / V8 4WD
Chevrolet Silverado 1500 2010 6.0L / 364 / V8 4WD
Chevrolet Silverado 1500 2011 6.0L / 364 / V8 4WD
Chevrolet Silverado 1500 2012 6.0L / 364 / V8 4WD
Chevrolet Silverado 1500 2013 6.0L / 364 / V8 4WD
Chevrolet Tahoe 2003 5.3L / 325 / V8 4WD
Chevrolet Tahoe 2004 5.3L / 325 / V8 4WD
Chevrolet Tahoe 2005 5.3L / 325 / V8 4WD
Chevrolet Tahoe 2006 5.3L / 325 / V8 4WD
Chevrolet Tahoe 2007 5.3L / 325 / V8 4WD
Chevrolet Tahoe 2008 6.0L / 364 / V8 4WD
Chevrolet Tahoe 2009 6.0L / 364 / V8 4WD
Chevrolet Tahoe 2010 6.0L / 364 / V8 4WD
Chevrolet Tahoe 2011 6.0L / 364 / V8 4WD
Chevrolet Tahoe 2012 6.0L / 364 / V8 4WD
Chevrolet Tahoe 2013 6.0L / 364 / V8 4WD
GMC Sierra 1500 HD Classic SLE 2007 6.0L / 364 / V8
GMC Sierra 1500 HD Classic SLT 2007 6.0L / 364 / V8
GMC Sierra 1500 HD SLE 2003 6.0L / 364 / V8
GMC Sierra 1500 HD SLE 2005 6.0L / 364 / V8
GMC Sierra 1500 HD SLE 2006 6.0L / 364 / V8
GMC Sierra 1500 HD SLT 2003 6.0L / 364 / V8
GMC Sierra 1500 HD SLT 2005 6.0L / 364 / V8
GMC Sierra 1500 HD SLT 2006 6.0L / 364 / V8
GMC Sierra 1500 Base 2004 6.0L / 364 / V8
GMC Sierra 1500 Denali 2003 6.0L / 364 / V8
GMC Sierra 1500 Denali 2004 6.0L / 364 / V8
GMC Sierra 1500 Denali 2005 6.0L / 364 / V8
GMC Sierra 1500 Denali 2006 6.0L / 364 / V8
GMC Sierra 1500 Hybrid 2009 6.0L / 364 / V8
GMC Sierra 1500 Hybrid 2010 6.0L / 364 / V8
GMC Sierra 1500 Hybrid 2011 6.0L / 364 / V8
GMC Sierra 1500 Hybrid 2012 6.0L / 364 / V8
GMC Sierra 1500 Hybrid 2013 6.0L / 364 / V8
GMC Sierra 1500 SLE 2004 6.0L / 364 / V8
GMC Sierra 1500 SLE 2005 6.0L / 364 / V8
GMC Sierra 1500 SLE 2006 6.0L / 364 / V8
GMC Sierra 1500 SLE 2007 6.0L / 364 / V8
GMC Sierra 1500 SLE 2008 6.0L / 364 / V8
GMC Sierra 1500 SLE 2009 6.0L / 364 / V8
GMC Sierra 1500 SLT 2004 6.0L / 364 / V8
GMC Sierra 1500 SLT 2005 6.0L / 364 / V8
GMC Sierra 1500 SLT 2006 6.0L / 364 / V8
GMC Sierra 1500 SLT 2007 6.0L / 364 / V8
GMC Sierra 1500 SLT 2008 6.0L / 364 / V8
GMC Sierra 1500 SLT 2009 6.0L / 364 / V8
GMC Sierra 1500 WT 2004 6.0L / 364 / V8
GMC Sierra 2500 HD Classic SLE 2007 6.0L / 364 / V8
GMC Sierra 2500 HD Classic SLT 2007 6.0L / 364 / V8
GMC Sierra 2500 HD Classic SL 2007 6.0L / 364 / V8
GMC Sierra 2500 HD Classic WT 2007 6.0L / 364 / V8
GMC Sierra 2500 HD Base 2003 6.0L / 364 / V8
GMC Sierra 2500 HD Base 2004 6.0L / 364 / V8
GMC Sierra 2500 HD Base 2005 6.0L / 364 / V8
GMC Sierra 2500 HD Denali 2011 6.0L / 364 / V8
GMC Sierra 2500 HD Denali 2012 6.0L / 364 / V8
GMC Sierra 2500 HD Denali 2013 6.0L / 364 / V8
GMC Sierra 2500 HD SLE 2003 6.0L / 364 / V8
GMC Sierra 2500 HD SLE 2004 6.0L / 364 / V8
GMC Sierra 2500 HD SLE 2005 6.0L / 364 / V8
GMC Sierra 2500 HD SLE 2006 6.0L / 364 / V8
GMC Sierra 2500 HD SLE 2007 6.0L / 364 / V8
GMC Sierra 2500 HD SLE 2008 6.0L / 364 / V8
GMC Sierra 2500 HD SLE 2009 6.0L / 364 / V8
GMC Sierra 2500 HD SLE 2010 6.0L / 364 / V8
GMC Sierra 2500 HD SLE 2011 6.0L / 364 / V8
GMC Sierra 2500 HD SLE 2012 6.0L / 364 / V8
GMC Sierra 2500 HD SLE 2013 6.0L / 364 / V8
GMC Sierra 2500 HD SLT 2003 6.0L / 364 / V8
GMC Sierra 2500 HD SLT 2004 6.0L / 364 / V8
GMC Sierra 2500 HD SLT 2005 6.0L / 364 / V8
GMC Sierra 2500 HD SLT 2006 6.0L / 364 / V8
GMC Sierra 2500 HD SLT 2007 6.0L / 364 / V8
GMC Sierra 2500 HD SLT 2008 6.0L / 364 / V8
GMC Sierra 2500 HD SLT 2009 6.0L / 364 / V8
GMC Sierra 2500 HD SLT 2010 6.0L / 364 / V8
GMC Sierra 2500 HD SLT 2011 6.0L / 364 / V8
GMC Sierra 2500 HD SLT 2012 6.0L / 364 / V8
GMC Sierra 2500 HD SLT 2013 6.0L / 364 / V8
GMC Sierra 2500 HD SL 2006 6.0L / 364 / V8
GMC Sierra 2500 HD WT 2003 6.0L / 364 / V8
GMC Sierra 2500 HD WT 2004 6.0L / 364 / V8
GMC Sierra 2500 HD WT 2005 6.0L / 364 / V8
GMC Sierra 2500 HD WT 2006 6.0L / 364 / V8
GMC Sierra 2500 HD WT 2007 6.0L / 364 / V8
GMC Sierra 2500 HD WT 2008 6.0L / 364 / V8
GMC Sierra 2500 HD WT 2009 6.0L / 364 / V8
GMC Sierra 2500 HD WT 2010 6.0L / 364 / V8
GMC Sierra 2500 HD WT 2011 6.0L / 364 / V8
GMC Sierra 2500 HD WT 2012 6.0L / 364 / V8
GMC Sierra 2500 HD WT 2013 6.0L / 364 / V8
GMC Sierra 2500 Base 2003 6.0L / 364 / V8
GMC Sierra 2500 Base 2004 6.0L / 364 / V8
GMC Sierra 2500 SLE 2003 6.0L / 364 / V8
GMC Sierra 2500 SLE 2004 6.0L / 364 / V8
GMC Sierra 2500 SLT 2003 6.0L / 364 / V8
GMC Sierra 2500 SLT 2004 6.0L / 364 / V8
GMC Sierra 2500 WT 2003 6.0L / 364 / V8
GMC Sierra 2500 WT 2004 6.0L / 364 / V8
GMC Sierra 3500 Classic SLE 2007 6.0L / 364 / V8
GMC Sierra 3500 Classic SLT 2007 6.0L / 364 / V8
GMC Sierra 3500 Classic SL 2007 6.0L / 364 / V8
GMC Sierra 3500 Classic WT 2007 6.0L / 364 / V8
GMC Sierra 3500 HD Denali 2011 6.0L / 364 / V8
GMC Sierra 3500 HD Denali 2012 6.0L / 364 / V8
GMC Sierra 3500 HD Denali 2013 6.0L / 364 / V8
GMC Sierra 3500 HD SLE 2007 6.0L / 364 / V8
GMC Sierra 3500 HD SLE 2008 6.0L / 364 / V8
GMC Sierra 3500 HD SLE 2009 6.0L / 364 / V8
GMC Sierra 3500 HD SLE 2010 6.0L / 364 / V8
GMC Sierra 3500 HD SLE 2011 6.0L / 364 / V8
GMC Sierra 3500 HD SLE 2012 6.0L / 364 / V8
GMC Sierra 3500 HD SLE 2013 6.0L / 364 / V8
GMC Sierra 3500 HD SLT 2007 6.0L / 364 / V8
GMC Sierra 3500 HD SLT 2008 6.0L / 364 / V8
GMC Sierra 3500 HD SLT 2009 6.0L / 364 / V8
GMC Sierra 3500 HD SLT 2010 6.0L / 364 / V8
GMC Sierra 3500 HD SLT 2011 6.0L / 364 / V8
GMC Sierra 3500 HD SLT 2012 6.0L / 364 / V8
GMC Sierra 3500 HD SLT 2013 6.0L / 364 / V8
GMC Sierra 3500 HD WT 2007 6.0L / 364 / V8
GMC Sierra 3500 HD WT 2008 6.0L / 364 / V8
GMC Sierra 3500 HD WT 2009 6.0L / 364 / V8
GMC Sierra 3500 HD WT 2010 6.0L / 364 / V8
GMC Sierra 3500 HD WT 2011 6.0L / 364 / V8
GMC Sierra 3500 HD WT 2012 6.0L / 364 / V8
GMC Sierra 3500 HD WT 2013 6.0L / 364 / V8
GMC Sierra 3500 Base 2003 6.0L / 364 / V8
GMC Sierra 3500 Base 2004 6.0L / 364 / V8
GMC Sierra 3500 Base 2005 6.0L / 364 / V8
GMC Sierra 3500 SLE 2003 6.0L / 364 / V8
GMC Sierra 3500 SLE 2004 6.0L / 364 / V8
GMC Sierra 3500 SLE 2005 6.0L / 364 / V8
GMC Sierra 3500 SLE 2006 6.0L / 364 / V8
GMC Sierra 3500 SLT 2003 6.0L / 364 / V8
GMC Sierra 3500 SLT 2004 6.0L / 364 / V8
GMC Sierra 3500 SLT 2005 6.0L / 364 / V8
GMC Sierra 3500 SLT 2006 6.0L / 364 / V8
GMC Sierra 3500 SL 2006 6.0L / 364 / V8
GMC Sierra 3500 WT 2004 6.0L / 364 / V8
GMC Sierra 3500 WT 2005 6.0L / 364 / V8
GMC Sierra 3500 WT 2006 6.0L / 364 / V8
GMC Yukon 2003 6.0L / 364 / V8 4WD
GMC Yukon 2004 6.0L / 364 / V8 4WD
GMC Yukon 2005 6.0L / 364 / V8 4WD
GMC Yukon 2006 6.0L / 364 / V8 4WD
GMC Yukon 2008 6.0L / 364 / V8 4WD
GMC Yukon 2009 6.0L / 364 / V8 4WD
GMC Yukon 2010 6.0L / 364 / V8 4WD
GMC Yukon 2011 6.0L / 364 / V8 4WD
GMC Yukon 2012 6.0L / 364 / V8 4WD
GMC Yukon 2013 6.0L / 364 / V8 4WD

Specifications:

Bolt Size M8 x 1.25 x 25mm, M8 x 1.25 x 25mm
CARB (California) Compliant No
Collector Diameter 2.50 inch
Emission Code 4
Engine GM Small Block Gen III/IV (LS Based)
Header Finish Black Paint
Header Style Shorty
Part Type Exhaust Header
Primary Tube Dia. 1-7/8 inch
Product Type Headers
Proposition 65 www.P65Warnings.ca.gov
Tube Material Mild Steel

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