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Flowmaster FlowFX Cat-Back Exhaust System 717931

Flowmaster FlowFX Cat-Back Exhaust System 717931
Flowmaster FlowFX Cat-Back Exhaust System 717931Flowmaster FlowFX Cat-Back Exhaust System 717931Flowmaster FlowFX Cat-Back Exhaust System 717931Flowmaster FlowFX Cat-Back Exhaust System 717931Flowmaster FlowFX Cat-Back Exhaust System 717931Flowmaster FlowFX Cat-Back Exhaust System 717931Flowmaster FlowFX Cat-Back Exhaust System 717931Flowmaster FlowFX Cat-Back Exhaust System 717931
$1,285.99 ea
NEWARRIVING SOONEstimated Ship Date 09/03/2025 (If Ordered Today)17 Available from HOLLEY PERFORMANCE PRODUCTS as of 08/17/2025
Model: 4952703
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
OVERSIZE 3
STORE PICKUP
[More Info]
The new Flowmaster® FlowFX® cat-back exhaust system for the 2011-2019 GM Silverado/Sierra 2500/3500 HD trucks with the 6.0-liter engine is manufactured using durable 409 stainless steel throughout and features 3.50-inch mandrel bent pipes for better exhaust gas flow, and a FlowFX "straight-through" muffler is used for a moderate sound level and maximum performance. Maximum increases on the dyno revealed +21 hp and +23 lb-ft at the rear wheels. This system exits out the side, behind the rear wheel with a 5.00-inch black ceramic tip for added style and a custom look. The system uses all the existing factory hanger locations and includes installation instructions and all necessary hardware for an easy installation that you can do at home. This exhaust system was designed for Crew Cab Short Bed trucks with the 6.5-foot bed and is backed by Flowmaster's Lifetime Limited Warranty.
Features:
  • Max increases of up to 21 hp and 23 lb-ft over the stock exhaust at the rear wheels
  • 3.50-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
  • 5.00-inch black ceramic coated tip adds a custom look to the truck
  • Includes complete hardware and factory styled hangers in the stock locations for an easy installation
  • Flowfx “straight through” performance muffler delivers a deep, moderate performance tone and improves exhaust flow
  • Backed by Flowmaster’s lifetime limited warranty
Fits Crew Cab trucks with a 6.5' bed.
Installation Notes:
Fits Crew Cab trucks with a 6.5' bed.
About Flowmaster

Manufacturer of performance exhaust systems, mufflers, performance air intakes, turbo boost modules, catalytic converters, race mufflers, headers and numerous exhaust accessories for late model cars, trucks, off-road, Jeeps, SUV’s, classic muscle cars, powersports vehicles and more. Flowmaster® gives you lots of exhaust choices with 12 designs of chambered mufflers, 3 styles of our exclusive “laminar-flow” mufflers and a new line of FlowFX “straight-through” performance mufflers, along with 5 sound categories of exhaust systems, giving you the customer, the power to custom tailor the sound of your vehicle whether you prefer mild, moderate or aggressive tones and sound levels. Since 1983, Flowmaster is the company you can trust, and has led the industry in offering only the best products you can buy for your vehicles.

Downloads:

Download Name File Size
fm_warranty_general.pdf88.58KB
717931_instructions.pdf1.69MB

Videos:

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 2500 HD High Country 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD High Country 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD High Country 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD High Country 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD High Country 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LTZ 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LTZ 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LTZ 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LTZ 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LTZ 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LTZ 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LTZ 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LTZ 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LTZ 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LT 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LT 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LT 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LT 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LT 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LT 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LT 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LT 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD LT 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD WT 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD WT 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD WT 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD WT 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD WT 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD WT 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD WT 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD WT 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 2500 HD WT 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD High Country 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD High Country 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD High Country 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD High Country 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD High Country 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LTZ 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LTZ 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LTZ 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LTZ 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LTZ 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LTZ 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LTZ 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LTZ 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LTZ 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LT 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LT 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LT 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LT 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LT 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LT 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LT 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LT 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD LT 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD WT 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD WT 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD WT 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD WT 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD WT 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD WT 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD WT 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD WT 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
Chevrolet Silverado 3500 HD WT 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Base 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Base 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Base 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Base 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Base 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Denali 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Denali 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Denali 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Denali 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Denali 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Denali 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Denali 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Denali 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD Denali 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLE 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLE 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLE 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLE 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLE 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLE 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLE 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLE 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLE 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLT 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLT 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLT 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLT 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLT 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLT 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLT 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLT 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD SLT 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD WT 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD WT 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD WT 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 2500 HD WT 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Base 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Base 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Base 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Base 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Base 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Denali 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Denali 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Denali 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Denali 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Denali 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Denali 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Denali 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Denali 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD Denali 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLE 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLE 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLE 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLE 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLE 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLE 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLE 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLE 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLE 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLT 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLT 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLT 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLT 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLT 2015 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLT 2016 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLT 2017 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLT 2018 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD SLT 2019 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD WT 2011 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD WT 2012 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD WT 2013 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only
GMC Sierra 3500 HD WT 2014 6.0L / 364 / V8 Fits Crew Cab 6.5-foot bed trucks only

Specifications:

California Proposition 65 Chemical Name Chromium (hexavalent compounds), Nickel (Metallic)
California Proposition 65 Required Yes
Emission Code 5
Exhaust Series FlowFX
Exit Position SOS
Material 409 Stainless Steel
Mount Type Uses Factory Hangers
Muffler Body Length (in) 18
Muffler Color Natural
Muffler Finish Brushed
Muffler Inlet Diameter 3.50
Muffler Inlet Location Centered
Muffler Material 409S Stainless Steel
Muffler Outlet Diameter 3.50
Muffler Outlet Location Centered
Muffler Overall Length (in) 24
Muffler Part Number Kit Only
Muffler Quantity 1
Muffler Series FlowFX
Muffler Shape Oval
Muffler Type Absorption
Part Type Exhaust System Kit
Product Type Exhaust System
Proposition 65 www.P65Warnings.ca.gov
Single Dual Single
Sound Level Moderate
System Type Cat-back
Tip Cut Angle
Tip Diameter 5.00
Tip Edge Style Rolled
Tip Finish Black Ceramic
Tip Length 12
Tip Logo Embossed
Tip Material 304 Stainless
Tip Quantity 1.00
Tip Shape Round
Tip Style Single Wall
Tubing Diameter (in) 3.50
Tubing Material 409S Stainless Steel

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