“This Flowmaster® Outlaw® Cat-back exhaust system for the 2020-2026 Chevy Silverado and GMC Sierra 2500HD/3500HD trucks with the 6.6L gas engine, is perfect if you...”
“Fits 2020-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Gas V8, Outlaw Series, 3.50" to Dual 3.00" Cat-Back,...”
Confirm fitment with the part number before ordering.
Product information
Manufacturer information. Check the part number and installation requirements for your vehicle.
Supplier details checked 2026-09-23 · Test catalog
Product description
Fits 2020-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Gas V8, Outlaw Series, 3.50" to Dual 3.00" Cat-Back, Dual Rear Exit, Stainless Steel Exhaust System
Flowmaster Outlaw Cat-Back Exhaust System
Features
3.50-inch and 3.00-inch mandrel bent 16-gauge 409 stainless steel tubing maximizes exhaust flow and improves durability
Super 10 Series performance muffler delivers a deep, aggressive performance tone and improves exhaust flow
Includes complete hardware and factory styled hangers in the stock locations for an easy installation
Can be configured to exit straight out the rear or out the side depending on preference
Max increases of up to 9 hp and 9 lb.ft. over the stock exhaust at the rear wheels
Dual 4.00-inch polished stainless steel tips add a custom look
Backed by Flowmaster’s Lifetime Limited Warranty
Manufacturer notes
Fits Crew Cab with 6.5-foot bed length, 159-inch wheelbase only.
Will not fit models with 5th wheel tow hitch installed.
Supplier category
Exhaust, Mufflers & Tips
Supplier subcategory
Catback
UPC / barcode
090127130162
Units per product
1
Supplier Proposition 65 status
Y
Supplier EPA status
N/A
Air freight prohibited
No
Not CARB approved
No
CARB acknowledgement required
Yes
Freight delivery required
No
Powersports product
No
More manufacturer information
Other product descriptions
Flowmaster 20-25 GM 2500HD 6.6L CCB Outlaw Cat-Back Exhaust System
20202025 GM 2500HD 66L CCSB OTL DORS
SYS 2020-2026 GM 250
About the manufacturer
This Flowmaster® Outlaw® Cat-back exhaust system for the 2020-2026 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.
Additional manufacturer information
SYS 20-26
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