Product Details
American Thunder™ Aluminized Steel Header-Back Exhaust System with Split Rear/Side Exit by Flowmaster®. Exhaust System Type: Header-Back. Exhaust Tubing Material: Aluminized Steel. Main Tubing Diameter: 2.5". Exhaust System Sound: Aggressive / Loud. American Thunder exhaust system is perfect for the person looking for a moderately aggressive sound level outside of the car, while maintaining a mild sound level inside, with all of the performance benefits that you would expect from Flowmaster. American Thunder gives you the classic sound of a Flowmaster chambered exhaust, which is the classic sound of classic American big performance engines. This is a system that gives the most sedate vehicle a performance rumble.
Notes
- The system comes with Super 44 Series mufflers
- This system is not designed as a direct bolt-on and will require the user to fabricate pipes to connect to manifolds or headers
- Not Legal For Use On Vehicles Originally Equipped with Catalytic Converter
- Remember to check your local and state laws regarding vehicle noise restrictions
Specifications
| Exhaust System Type: Header-Back |
| Exhaust Tubing Material: Aluminized Steel |
| Exit Location: Split Rear/Side |
| Exit Configuration: Dual |
| Main Tubing Diameter: 2.5" |
| Exhaust System Sound: Aggressive / Loud |
| Color: Black |
| Exhaust Inlet Connection Type: Flanged |
| Muffler Inlet Diameter: 2.5" |
| Muffler Outlet Diameter: 2.5" |
| Muffler Series: Super 44 |
| Muffler Quantity: 2 |
| Muffler Body Shape: Oval |
| Muffler Type: Welded Baffle |
Includes
- (1) Exit Pipe, Left (Part Number 86148)
- (1) Exit Pipe, Right (Part Number 86147)
- (1) H- pipe Assembly (Part Number 86178)
- (1) Left Muffler Hanger (Part Number 468HA)
- (1) Over-axle Pipe, Left (Part Number 86144)
- (1) Over-axle Pipe, Right (Part Number 86143)
- (1) Parts Kit (Part Number PK759)
- (1) Right Muffler Hanger (Part Number 469HA)
- (2) Adapter Pipe (Part Number 86155)
- (2) Adapter Pipe, (Part Number 86149)
- (2) Back-up Plate (Part Number HA226)
- (2) Frame Hanger (Part Number HA602)
- (2) Muffler (Part Number 952546)
- (2) Rubber Hanger (Part Number HA168)
- (2) Stainless Tip (Part Number ST456)
- (4) 7/16" Hanger Keeper (Part Number HW502)
- (6) 3/8" Lock Washer (Part Number HW309)
- (6) 3/8" Nut (Part Number HW103)
- (6) 3/8" x 1" Bolt (Part Number HW208)
- (8) 2 1/2" Clamp (Part Number MC250BS)
Features
- High Quality Performance Sound
- Increases Torque and Power
- Mandrel Bent 16 Gauge Tubing
- Includes Hangers and Hardware for Easy Installation
- Every System Tuned on Dynamometer
American Thunder gives you exactly the sound that is promised by the name of the series. The exhaust sound of the American Thunder system has become a symbol of American power that is recognized all over the world. American Thunder is the most popular of the Flowmaster exhaust systems, enhancing power, torque, throttle response and mileage for automobile enthusiasts all over the world.
All Flowmaster exhaust systems give the same improvement of performance. All Flowmaster exhaust systems produce a beautiful deep performance tone. Choosing between the five different exhaust systems is not a technical decision – it is all up to your personal taste. It’s A Sound Decision™. The racing origin is evident in every Flowmaster exhaust system. All the five series of systems are tuned for maximum performance. They differ in technology and tuning, and thus in tone and character, giving you a performance engine sound to your personal liking.
Flowmaster exhaust systems employ two unique technologies, the patented Delta Flow and the Laminar Flow. They give different characters of sound and can be tuned to achieve the desired exhaust note. Flowmaster Exhaust System Technology is so versatile and gives such a high degree of control that it is used both by racers, who want maximum power, and by the U.S. Air Force in Stealth applications, where maximum silence and minimum heat emissions are prime considerations.
Be it for a domestic or import truck, SUV, off-road warrior, daily driver, muscle car, euro-spec cruiser or sport compact vehicle, Flowmaster technicians personally hand select the right muffler, tubing size, resonator, and tip to make the process easy for you. Best of all, Flowmaster stainless steel exhaust systems are covered by a Limited Lifetime Warranty; ensuring that your exhaust will last as long as you own your vehicle. If you choose aluminized steel products, Flowmaster backs them up with a 3-year warranty.
Flowmaster® has its roots in solving the engine noise problems encountered by California racers in the 1980s. In 1983 Flowmaster’s founder, Ray Flugger, created his first patented design of racing silencers, which dampened noise with minimal loss of power. Ray attached handles to ease carrying the square shaped race mufflers through the race pits, and the mufflers became known as the "suitcase mufflers." Today, the innovative Flowmaster mufflers are the result of years of development with top race engine builders, thousands of hours of dyno research and "real-world" on-track testing.