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Flowmaster Outlaw Cat-Back Exhaust System 818112

Flowmaster Outlaw Cat-Back Exhaust System 818112
Flowmaster Outlaw Cat-Back Exhaust System 818112Flowmaster Outlaw Cat-Back Exhaust System 818112Flowmaster Outlaw Cat-Back Exhaust System 818112Flowmaster Outlaw Cat-Back Exhaust System 818112Flowmaster Outlaw Cat-Back Exhaust System 818112Flowmaster Outlaw Cat-Back Exhaust System 818112Flowmaster Outlaw Cat-Back Exhaust System 818112Flowmaster Outlaw Cat-Back Exhaust System 818112
$1,273.99 ea
NEWARRIVING SOONEstimated Ship Date 12/16/2024 (If Ordered Today)38 Available from HOLLEY PERFORMANCE PRODUCTS as of 11/28/2024
Model: 4952756
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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This Flowmaster® Outlaw® Cat-back exhaust system for the 2020-2023 Chevy Silverado and GMC Sierra 2500HD/3500HD trucks with the 6.6L gas engine, is perfect if you are looking for an aggressive sound level inside and outside of the truck, with all of the performance benefits that you would expect from Flowmaster®. Maximum increases of up to 9 hp and 9 lb.ft. over the stock exhaust at the rear wheels. Designed for the Crew Cab, Standard Bed (6.5 ft.) models only, this bolt-on, emissions-legal system features a stainless steel Outlaw series muffler and large dual 3.00-inch 409 stainless steel mandrel-bent tailpipes that can be configured to exit either dual straight out the back, or dual out the sides behind the rear wheels which is best suited for towing applications. The system is finished off with polished 4.00-inch stainless steel tips and is covered by our Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation.
Features:
  • Max increases of up to 9 hp and 9 lb.ft. over the stock exhaust at the rear wheels
  • 3.50-inch and 3.00-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
  • Dual 4.00-inch polished stainless steel tips add a custom look
  • Includes complete hardware and factory styled hangers in the stock locations for an easy installation
  • Super 10 Series performance muffler delivers a deep, aggressive performance tone and improves exhaust flow
  • Backed by Flowmaster’s Lifetime Limited Warranty
  • Can be configured to exit straight out the rear or out the side depending on preference
Fits Crew Cab with 6.5-foot bed length, 159-inch wheelbase only. Will not fit models with 5th wheel tow hitch installed.
Installation Notes:
Fits Crew Cab with 6.5-foot bed length, 159-inch wheelbase only. Will not fit models with 5th wheel tow hitch installed.

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
818112_instructions.pdf5.56MB

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 Custom 2020 6.6L / 401 / V8
Chevrolet Silverado 2500 HD Custom 2021 6.6L / 401 / V8
Chevrolet Silverado 2500 HD Custom 2022 6.6L / 401 / V8
Chevrolet Silverado 2500 HD Custom 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
Chevrolet Silverado 2500 HD High Country 2020 6.6L / 401 / V8
Chevrolet Silverado 2500 HD High Country 2021 6.6L / 401 / V8
Chevrolet Silverado 2500 HD High Country 2022 6.6L / 401 / V8
Chevrolet Silverado 2500 HD High Country 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
Chevrolet Silverado 2500 HD LTZ 2020 6.6L / 401 / V8
Chevrolet Silverado 2500 HD LTZ 2021 6.6L / 401 / V8
Chevrolet Silverado 2500 HD LTZ 2022 6.6L / 401 / V8
Chevrolet Silverado 2500 HD LTZ 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
Chevrolet Silverado 2500 HD LT 2020 6.6L / 401 / V8
Chevrolet Silverado 2500 HD LT 2021 6.6L / 401 / V8
Chevrolet Silverado 2500 HD LT 2022 6.6L / 401 / V8
Chevrolet Silverado 2500 HD LT 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
Chevrolet Silverado 2500 HD WT 2020 6.6L / 401 / V8
Chevrolet Silverado 2500 HD WT 2021 6.6L / 401 / V8
Chevrolet Silverado 2500 HD WT 2022 6.6L / 401 / V8
Chevrolet Silverado 2500 HD WT 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
Chevrolet Silverado 3500 HD Base 2020 6.6L / 401 / V8
Chevrolet Silverado 3500 HD Base 2021 6.6L / 401 / V8
Chevrolet Silverado 3500 HD Base 2022 6.6L / 401 / V8
Chevrolet Silverado 3500 HD Base 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
Chevrolet Silverado 3500 HD High Country 2020 6.6L / 401 / V8
Chevrolet Silverado 3500 HD High Country 2021 6.6L / 401 / V8
Chevrolet Silverado 3500 HD High Country 2022 6.6L / 401 / V8
Chevrolet Silverado 3500 HD High Country 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
Chevrolet Silverado 3500 HD LTZ 2020 6.6L / 401 / V8
Chevrolet Silverado 3500 HD LTZ 2021 6.6L / 401 / V8
Chevrolet Silverado 3500 HD LTZ 2022 6.6L / 401 / V8
Chevrolet Silverado 3500 HD LTZ 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
Chevrolet Silverado 3500 HD LT 2020 6.6L / 401 / V8
Chevrolet Silverado 3500 HD LT 2021 6.6L / 401 / V8
Chevrolet Silverado 3500 HD LT 2022 6.6L / 401 / V8
Chevrolet Silverado 3500 HD LT 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
Chevrolet Silverado 3500 HD WT 2020 6.6L / 401 / V8
Chevrolet Silverado 3500 HD WT 2021 6.6L / 401 / V8
Chevrolet Silverado 3500 HD WT 2022 6.6L / 401 / V8
Chevrolet Silverado 3500 HD WT 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
GMC Sierra 2500 HD AT4 2020 6.6L / 401 / V8
GMC Sierra 2500 HD AT4 2021 6.6L / 401 / V8
GMC Sierra 2500 HD AT4 2022 6.6L / 401 / V8
GMC Sierra 2500 HD AT4 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
GMC Sierra 2500 HD Base 2020 6.6L / 401 / V8
GMC Sierra 2500 HD Base 2021 6.6L / 401 / V8
GMC Sierra 2500 HD Denali 2020 6.6L / 401 / V8
GMC Sierra 2500 HD Denali 2021 6.6L / 401 / V8
GMC Sierra 2500 HD Denali 2022 6.6L / 401 / V8
GMC Sierra 2500 HD Denali 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
GMC Sierra 2500 HD Pro 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
GMC Sierra 2500 HD SLE 2020 6.6L / 401 / V8
GMC Sierra 2500 HD SLE 2021 6.6L / 401 / V8
GMC Sierra 2500 HD SLE 2022 6.6L / 401 / V8
GMC Sierra 2500 HD SLE 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
GMC Sierra 2500 HD SLT 2020 6.6L / 401 / V8
GMC Sierra 2500 HD SLT 2021 6.6L / 401 / V8
GMC Sierra 2500 HD SLT 2022 6.6L / 401 / V8
GMC Sierra 2500 HD SLT 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
GMC Sierra 3500 HD AT4 2020 6.6L / 401 / V8
GMC Sierra 3500 HD AT4 2021 6.6L / 401 / V8
GMC Sierra 3500 HD AT4 2022 6.6L / 401 / V8
GMC Sierra 3500 HD AT4 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
GMC Sierra 3500 HD Base 2020 6.6L / 401 / V8
GMC Sierra 3500 HD Base 2021 6.6L / 401 / V8
GMC Sierra 3500 HD Denali 2020 6.6L / 401 / V8
GMC Sierra 3500 HD Denali 2021 6.6L / 401 / V8
GMC Sierra 3500 HD Denali 2022 6.6L / 401 / V8
GMC Sierra 3500 HD Denali 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
GMC Sierra 3500 HD Pro 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
GMC Sierra 3500 HD SLE 2020 6.6L / 401 / V8
GMC Sierra 3500 HD SLE 2021 6.6L / 401 / V8
GMC Sierra 3500 HD SLE 2022 6.6L / 401 / V8
GMC Sierra 3500 HD SLE 2023 6.6L / 401 / V8 FITS CREW CAB, 6.5-FOOT BED TRUCKS ONLY
GMC Sierra 3500 HD SLT 2020 6.6L / 401 / V8
GMC Sierra 3500 HD SLT 2021 6.6L / 401 / V8
GMC Sierra 3500 HD SLT 2022 6.6L / 401 / V8
GMC Sierra 3500 HD SLT 2023 6.6L / 401 / 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 Outlaw
Exit Position DOR/S
Inlet Tubing Diameter 3.50
Material 409 Stainless Steel
Mount Type Uses Factory Hangers
Muffler Body Length (in) 6.5
Muffler Color Black
Muffler Finish Painted
Muffler Inlet Diameter (in) 3.50
Muffler Inlet Location Centered
Muffler Material 409S Stainless Steel
Muffler Outlet Diameter (in) 3.00
Muffler Outlet Location Dual Outlet
Muffler Overall Length (in) 12.375
Muffler Part Number Kit Only
Muffler Quantity 1
Muffler Series 10 Series
Muffler Shape Oval
Muffler Type Reflection
Outlet Tubing Diameter 3.00
Part Type Exhaust System Kit
Product Type Exhaust System
Proposition 65 www.P65Warnings.ca.gov
Single Dual Dual
Sound Level Aggressive
System Type Cat-back
Tip Cut Angle
Tip Diameter 4.00
Tip Edge Style Cut
Tip Finish Polished
Tip Length 13
Tip Logo Embossed
Tip Material 304 Stainless
Tip Quantity 2.00
Tip Shape Round
Tip Style Double Wall
Tubing Diameter (in) 3.5/3
Tubing Material 409S Stainless Steel

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Flowmaster Outlaw Cat-Back Exhaust System 818112:
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