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✔ Manufacturer warranty: we help with claims
✔ Fitment question? Email [email protected]
Shipping: Ships from the manufacturer or distributor. Processing times vary by manufacturer; we'll email tracking as soon as your order ships.
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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.
| Part Number | 817933 |
| Brand | Flowmaster |
| CARB (California) Compliant | Yes |
| Exhaust Series | American Thunder |
| Heat Shield Included | No |
| Mount Type | Uses Factory Hangers |
| Muffler Color | Black |
| Muffler Included | Yes |
| Muffler Inlet Location | Center |
| Muffler Outlet Diameter | 3.00 |
| Muffler Outlet Location | Dual |
| Muffler Overall Length | 24.00 |
| Muffler Part Number | Kit Only |
| Muffler Series | 50 Series HD |
| Sound Level | Aggressive / Moderate |
| Tail Pipe Quantity | Dual |
| Tip Logo | Embossed |
| Pipe Color | Silver |
Double-check your vehicle details before ordering. Questions? Email [email protected].
What vehicles does it fit?
It fits 2020-2026 Chevy Silverado/GMC Sierra 2500HD/3500HD trucks with 6.6L gas engine. Crew Cab/6.5ft bed only. Will not fit models with 5th wheel tow hitch installed; Fits Crew Cab with 6.5' bed length, 159-inch wheelbase only.; Will not fit models with 5th wheel tow hitch installed.. Double-check your vehicle details before ordering. Questions? Email [email protected].
What warranty does it have?
Backed by Flowmaster's Lifetime Limited Warranty.
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
Why Choose Venture Overland Company: Free shipping on orders over $100, most orders ship in 1-2 business days, and every order is covered by our 30-day return policy.
Gear Up for Adventure
At Venture Overland Company, our motto is simple: Find Your Way. Whether you're hitting the backroads for a weekend escape or building the ultimate overland rig for months on the trail, we're here to help you get there. Every part we carry is chosen to give you the reliability, performance, and confidence to go farther and explore more. Load up, point the wheels off the pavement, and find your way—your adventure starts here.
Empowering Your Journey
At Venture Overland Company, we provide a carefully curated selection of top-tier brands and expert guidance to help you enhance your vehicle’s performance. Our community-driven approach ensures every product integrates seamlessly into your adventures, whether upgrading your Jeep, Toyota, or Ford. With our focus on quality, versatility, and outstanding service, we’re more than a store—we’re your partner in every off-road experience.
Quick answers about returns, shipping, warranty and support for orders from Venture Overland Company.
