
Description
The Flowmaster American Thunder Cat-back exhaust system for the 2020-2026 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. Will not fit models with 5th wheel tow hitch installed
- Mandrel-bent 16-gauge Tubing for Maximum Exhaust Flow
- Uses the Factory Hanger Locations for Easy Installation
- 50 Series HD Muffler with Delta Flow Technology
- 409 Stainless Steel Construction for Long Life
- Increased Performance and Exhaust Flow
- Multiple Tailpipe Exits Provided in Kit
- Large 3.00-inch Dual Tailpipes
- Deep Powerful Exterior Sound
- Lifetime Limited Warranty
- Flowmaster Quality
➡️ Warranty
Flowmaster Warranty
Coverage: Manufacturer's Limited Lifetime Warranty.
Coverage applies to the original purchaser while the product remains installed on the original vehicle and protects against defects in materials and workmanship. Normal wear, cosmetic changes, racing use, improper installation, alteration, misuse, collision, and road-impact damage are excluded.
Proof of purchase is required; warranty registration is not mandatory. Flowmaster may replace the product or refund the original purchase price after inspection. Installation, removal, labour, towing, transportation, and return-shipping costs are not covered.
➡️ Shipping & Returns
Shipping & Refund Policy
Shipping:
We ship across Canada. Orders are processed within 1–2 business days. Delivery within Canada typically takes 3–10 business days depending on location and carrier. Tracking information will be provided once your order ships.
Refunds & Returns:
Returns are accepted within 30 days of delivery. Items must be unused and in original packaging. Please review our full return policy for more details.
Damaged or Incorrect Items:
If you receive a damaged or incorrect item, please contact us within 5 days of delivery. Call or text 416-624-1357 or email sales@Niagarajeeps.ca so we can resolve the issue quickly.
➡️ Fitment Table
Vehicle Fitment
| Year | Make | Model |
|---|---|---|
| 2020-2026 | Chevrolet | Silverado 2500 HD |
| 2021-2026 | Chevrolet | Silverado 3500 HD |
| 2020 | GMC | Sierra 2500 HD |
| 2022-2026 | GMC | Sierra 2500 HD |
| 2021-2026 | GMC | Sierra 3500 HD |
Confirm engine, cab, wheelbase, body style, emissions requirements, and other product-specific requirements before ordering.
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