Skip to content
Enhance performance and sound with durable stainless steel construction.
The Flowmaster American Thunder Cat-Back Exhaust System is engineered to improve vehicle performance while delivering a deep, aggressive sound. Constructed from 409S stainless steel, this exhaust system ensures durability and longevity, making it a reliable choice for automotive enthusiasts. The system features a Super 40 series muffler that enhances exhaust flow and provides a noticeable increase in horsepower and torque, with maximum dyno gains of 11 horsepower and 10 pound-feet at the rear wheels.
This exhaust kit includes a 3-inch inlet pipe that transitions to dual 2-1/2 inch tailpipes, offering both rear and side exit options for a customizable appearance. The mandrel bent tubing maximizes exhaust flow, while the 3-1/2 inch polished stainless steel tips add a classic performance aesthetic. Designed for easy installation, the system utilizes factory mounting locations and includes all necessary hardware, eliminating the need for welding.
With features such as Delta Flow technology to reduce drone and a sound level classified as aggressive to moderate, this exhaust system is suitable for those seeking enhanced performance without compromising on sound quality. The Flowmaster American Thunder Cat-Back Exhaust System is a comprehensive solution for improving both the look and performance of your vehicle.
Features
- Stainless Steel Construction Adds Durability
- Features Both Rear And Side Exit Tailpipes So The Final Look Can Be Customized
- Super 40 Series Performance Muffler Delivers A Deep And Aggressive Performance Tone
- Clears The Factory Spare Tire
- Features 3-1/2 Inch Polished Stainless Steel Tips Add A Classic Performance Look
- Delta Flow Technology Increases Performance And Reduces Drone
- Mandrel Bent Tubing Maximizes Exhaust Flow
- Uses The Factory Hanger Locations For An Easy Installation
Specifications
- Manufacturer: Flowmaster
- Manufacturer Part Number: 817979
- Type: Cat-Back
- Exhaust Type: Single
- Outlet Type: Dual
- Exit Position: Driver And Passenger Rear Or Driver And Passenger Side Behind Tire
- Material: Stainless Steel
- Includes Muffler: Yes
- Sound Level: Aggressive/ Moderate
- Diameter (IN): 3 Inch To 2-1/2 Inch
- Includes Exhaust Tip: Yes
- Exhaust Tip Style: 3-1/2 Inch Double Wall Angle-Cut
- Exhaust Tip Material: Stainless Steel
- Muffler Quantity: 1
- Includes Exhaust Pipe Muffler Delete: No
- Muffler Configuration: Single Inlet/ Dual Outlet
- Muffler Brand: Flowmaster
- Includes Hardware: Yes
- Required Welding: No
- Estimated Install Time (Hours): 2
Compatibility / Fit
- 2021-2026 Ford F-150
Technical Documents
Product Videos
Shipping & Returns
- This product ships within the continental USA only.
- This product typically ships within 1 to 3 business days.
- Returns are accepted within 30 days for items in like-new condition. For complete details, please see our return policy.
