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Flowmaster American Thunder Cat-Back Exhaust System 817602

Flowmaster American Thunder Cat-Back Exhaust System 817602
Flowmaster American Thunder Cat-Back Exhaust System 817602Flowmaster American Thunder Cat-Back Exhaust System 817602Flowmaster American Thunder Cat-Back Exhaust System 817602Flowmaster American Thunder Cat-Back Exhaust System 817602Flowmaster American Thunder Cat-Back Exhaust System 817602Flowmaster American Thunder Cat-Back Exhaust System 817602
$1,428.99 ea
NEWARRIVING SOONEstimated Ship Date 12/10/2024 (If Ordered Today)100 Available from HOLLEY PERFORMANCE PRODUCTS as of 11/22/2024
Model: 4005382
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
OVERSIZE 2
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The American Thunder® Cat-back exhaust system for 2011-2018 Chevrolet Silverado and GMC Sierra 1500 trucks with the 6.2L engine, is perfect for the person looking for an aggressive exterior sound level while maintaining a moderate interior tone. This bolt-on stainless steel system features a 3.50-inch mandrel-bent inlet pipe flowing into the 50 Series™ HD performance muffler with large 4.00-inch internals and a built-in tuned resonance chamber to minimize interior drone. The system has dual 2.50-inch mandrel-bent tailpipes which use the factory hanger locations and are finished off with large 3.50-inch polished stainless steel tips. This exhaust system gives you choices for tailpipe exit location either out each side behind the rear tires if you do a lot of towing, or straight-out under the rear bumper for a muscular look. The exhaust system is covered by our Lifetime Limited Warranty and includes all necessary parts and hardware for easy installation you can do at home. Note: Fits 2/4 WD model with Crew Cab/Short Bed (143.5" WB), Crew Cab/Standard Bed (153" WB) and Double Cab/Standard Bed (143.5" WB).
Features:
  • Dyno Tuned For Maximum Performance
  • Uses the Factory Hanger Locations
  • 50 Series HD Performance Muffler
  • Your Choice of Two Tailpipe Exits
  • Clears the Factory Spare Tire
  • Stainless Steel Construction
  • Lifetime Limited Warranty
Fits 2011-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 with 6.2L engine, 2/4 WD model with Crew Cab/Short Bed (143.5" WB), Crew Cab/Standard Bed (153" WB) and Double Cab/Standard Bed (143.5" WB).
Installation Notes:
Fits 2011-2018 Chevrolet Silverado 1500 and GMC Sierra 1500 with 6.2L engine, 2/4 WD model with Crew Cab/Short Bed (143.5" WB), Crew Cab/Standard Bed (153" WB) and Double Cab/Standard Bed (143.5" WB).
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
817602_instructions.pdf1.77MB

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
Chevrolet Silverado 1500 High Country 2014 6.2L / 376 / V8
Chevrolet Silverado 1500 High Country 2015 6.2L / 376 / V8
Chevrolet Silverado 1500 High Country 2016 6.2L / 376 / V8
Chevrolet Silverado 1500 High Country 2017 6.2L / 376 / V8
Chevrolet Silverado 1500 High Country 2018 6.2L / 376 / V8
Chevrolet Silverado 1500 LTZ 2011 6.2L / 376 / V8
Chevrolet Silverado 1500 LTZ 2012 6.2L / 376 / V8
Chevrolet Silverado 1500 LTZ 2013 6.2L / 376 / V8
Chevrolet Silverado 1500 LTZ 2014 6.2L / 376 / V8
Chevrolet Silverado 1500 LTZ 2015 6.2L / 376 / V8
Chevrolet Silverado 1500 LTZ 2016 6.2L / 376 / V8
Chevrolet Silverado 1500 LTZ 2017 6.2L / 376 / V8
Chevrolet Silverado 1500 LTZ 2018 6.2L / 376 / V8
Chevrolet Silverado 1500 LT 2011 6.2L / 376 / V8
Chevrolet Silverado 1500 LT 2012 6.2L / 376 / V8
Chevrolet Silverado 1500 LT 2013 6.2L / 376 / V8
GMC Sierra 1500 Denali 2011 6.2L / 376 / V8
GMC Sierra 1500 Denali 2012 6.2L / 376 / V8
GMC Sierra 1500 Denali 2013 6.2L / 376 / V8
GMC Sierra 1500 Denali 2014 6.2L / 376 / V8
GMC Sierra 1500 Denali 2015 6.2L / 376 / V8
GMC Sierra 1500 Denali 2016 6.2L / 376 / V8
GMC Sierra 1500 Denali 2017 6.2L / 376 / V8
GMC Sierra 1500 Denali 2018 6.2L / 376 / V8
GMC Sierra 1500 SLE 2011 6.2L / 376 / V8
GMC Sierra 1500 SLE 2012 6.2L / 376 / V8
GMC Sierra 1500 SLE 2013 6.2L / 376 / V8
GMC Sierra 1500 SLT 2011 6.2L / 376 / V8
GMC Sierra 1500 SLT 2012 6.2L / 376 / V8
GMC Sierra 1500 SLT 2013 6.2L / 376 / V8
GMC Sierra 1500 SLT 2014 6.2L / 376 / V8
GMC Sierra 1500 SLT 2015 6.2L / 376 / V8
GMC Sierra 1500 SLT 2016 6.2L / 376 / V8
GMC Sierra 1500 SLT 2017 6.2L / 376 / V8
GMC Sierra 1500 SLT 2018 6.2L / 376 / V8

Specifications:

California Proposition 65 Chemical Name Chromium (hexavalent compounds), Nickel (Metallic)
California Proposition 65 Required Yes
Catalytic Converter Included No
Emission Code 5
Exhaust Series American Thunder
Exit Position Dual Out Rear / Dual Out Side
Heat Shield No
Material 409 Stainless Steel
Mount Type Uses Factory Hangers
Muffler Finish Gray
Muffler Inlet Diameter (in) 3.5
Muffler Material 409S Stainless Steel
Muffler Outlet Diameter (in) 2.5
Muffler Part Number Kit Only
Muffler Quantity 1
Muffler Series 50 Series HD
Muffler Shape Oval
Muffler Type Welded Baffle
Part Type Exhaust System Kit
Product Type Exhaust System
Proposition 65 www.P65Warnings.ca.gov
Single Dual Dual
Sound Level Aggressive / Moderate
System Type Cat-back
Tip Cut Angle
Tip Diameter (in) 3.5
Tip Edge Style Cut
Tip Finish Polished
Tip Length (in) 13
Tip Logo Embossed
Tip Material 304 Stainless
Tip Quantity 2
Tip Shape Round
Tubing Diameter (in) 2.5
Tubing Material 409S Stainless Steel
Warranty Limited Lifetime (Lifetime)

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Flowmaster American Thunder Cat-Back Exhaust System 817602:
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