Description
Transform your 2009-2021 Toyota Tundra with the Flowmaster American Thunder Cat-Back Exhaust System (817664). Engineered for power, sound, and durability, this system delivers a deep, aggressive exhaust tone on the outside while maintaining a refined growl inside the cabin.
Built from 409S stainless steel, this system features a Super 40® Series performance muffler with dual 2.50-inch mandrel-bent tailpipes, designed for maximum airflow and horsepower gains. The kit includes two exit options—dual rear or dual side, making it ideal for both performance enthusiasts and those needing a towing-friendly setup.
For a bold, high-quality finish, the system is topped off with 3.50-inch double-wall polished stainless steel tips. It also includes all necessary hardware for an easy, at-home bolt-on installation using factory hanger locations. Backed by Flowmaster’s Lifetime Limited Warranty, this system ensures long-lasting performance and reliability.
Key Features & Benefits
- Aggressive Exterior Sound – Deep performance tone with a controlled interior growl
- Super 40 Series Muffler – Classic Flowmaster sound with enhanced exhaust flow
- 409S Stainless Steel Construction – Corrosion-resistant for long-term durability
- Mandrel-Bent Tubing – Improves exhaust flow for increased horsepower & torque
- Dual Exit Options – Choose between dual rear or dual side exits
- 3.50-Inch Polished Stainless Steel Tips – Embossed with Flowmaster branding
- Clears Factory Spare Tire – Designed for seamless stock compatibility
- Easy Bolt-On Installation – Uses factory hanger locations, no welding required
- Lifetime Limited Warranty – Guaranteed long-lasting performance
Vehicle Fitment
- 2009-2021 Toyota Tundra – 4.6L, 4.7L & 5.7L engines
- Fits: 2WD & 4WD models with a 145-inch wheelbase
- Does NOT Fit: Regular Cab/Short Bed or Double Cab/Long Bed configurations
- Only Fits: Models built after 08/2008
Specifications
- Exhaust Type: Cat-Back
- Material: 409S Stainless Steel
- Main Piping Diameter: 2.50"
- Muffler Series: Super 40® Series
- Muffler Type: Performance
- Exit Style: Dual Out Rear OR Dual Out Side
- Tip Diameter: 3.50"
- Tip Finish: Polished Stainless Steel
- Tip Length: 13.00"
- Installation: Bolt-on, No Welding Required
- Warranty: Lifetime Limited Warranty
Why Choose the Flowmaster American Thunder Cat-Back Exhaust?
- Signature Flowmaster Sound – Aggressive, deep rumble that turns heads
- Performance & Style – Boosts power while enhancing your truck’s appearance
- Dual Exit Flexibility – Choose the best setup for your needs
- DIY-Friendly Installation – Designed for hassle-free mounting with factory hangers
Upgrade your Toyota Tundra’s performance and sound with the Flowmaster American Thunder Cat-Back Exhaust (817664)—a powerful and durable exhaust system built for serious truck owners.
