Flowmaster 817725 American Thunder Kit
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Flowmaster 817725 American Thunder Kit


Flowmaster 817725 American Thunder Kit
The classic sound of a Flowmaster chambered exhaust, our American Thunder® Series features mufflers tuned to deliver more power, torque, throttle response and Mileage. Best of all, these exhaust systems take sedate vehicles and deliver that great performance tone especially designed for muscle car and truck fans. American Thunder is the most authentic Flowmaster muffler sound we offer.

Sound Level: Moderate And Aggressive
Type: Cat-Back
Exhaust Type: Single
Outlet Type: Dual
Exit Position: Dual Out Rear/ Dual Out Side Exit
Material: Stainless Steel
Diameter (IN): 2-1/2 Inch
Includes Exhaust Tip: Yes
Exhaust Tip Type: Round Slash-Cut
Exhaust Tip Size (IN): 3-1/2 Inch
Exhaust Tip Material: Stainless Steel
Includes Muffler: Yes
Muffler Quantity: 1
Includes Exhaust Pipe Muffler Delete: No
Muffler Configuration: Single Inlet, Dual Outlet
Muffler Brand: Super 40 Series
Includes Hardware: Yes
Required Welding: No



  • Stainless Steel Construction
  • Patented Delta Flow Technology
  • Mandrel Bent
  • Limited Lifetime Warranty
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