Guaranteed Fitment
Always the correct part
In-House Experts
We know our products
Fast Shipping
Quick delivery across Canada
Secure Checkout
100% safe & secure
Flowmaster 817933 American Thunder Cat Back Exhaust System Flowmaster 817933
$1,477.36
- Free shipping in Canada
- No duties – Canadian store
- Returns within 30 days of purchase
- Delivery in 2–5 business days
The Flowmaster American Thunder Cat-back exhaust system for the 2020-2022 Chevy Silverado and GMC Sierra 2500HD and 3500HD trucks with the 6.6L gas engine, has a moderate to aggressive sound level ...
Description
The Flowmaster American Thunder Cat-back exhaust system for the 2020-2022 Chevy Silverado and GMC Sierra 2500HD and 3500HD trucks with the 6.6L gas engine, has a moderate to aggressive sound level inside and outside of the truck, with all of the performance benefits you expect from Flowmaster. Designed for the Crew Cab, Standard Bed (6.5 ft.) models only, this bolt-on, emissions-legal system features a stainless steel 50 Series HD 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 a pair of large 4.00-inch polished 304 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. Notes: Fits Crew Cab with 6.5 bed length, 159-inch wheelbase only.
Specifications:
Fitment
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 2020 | Chevrolet | Silverado 2500 HD | ||
| 2021 | Chevrolet | Silverado 2500 HD | ||
| 2022 | Chevrolet | Silverado 2500 HD | ||
| 2020 | GMC | Sierra 2500 HD | ||
| 2021 | GMC | Sierra 2500 HD | ||
| 2022 | GMC | Sierra 2500 HD |
Shipping Information
We offer FREE shipping on all orders within Canada. Most orders ship within 1-2 business days.
Standard delivery typically takes 2-5 business days depending on your location.
Returns Policy
We accept returns within 30 days of purchase. Items must be in original condition with all packaging.
For returns or exchanges, please contact our customer service team.

