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  1. Flowmaster 1998 Mustang American Thunder Catback System
    $699.95

    Flowmaster 1998 GT American Thunder Catback System

    • 2.5" Outlet
    • 40 Series Delta Flow Mufflers
    • Stainless OEM Style Tips
    • American Thunder



    American Thunder
    Looking for the famous, full-on "Flowmaster tone?" Look no further. This American Thunder system will deliver the aggressive tone you want, as well as the performance you demand.

    Delta Flow Technology
    Developed from Flowmaster's line of Delta Force® race mufflers, Delta Flow® technology provides superior scavenging of exhaust gases even over a comparable (standard) Flowmaster muffler. This results in increased horsepower, torque and fuel economy, along with reductions in exterior sound levels and interior resonance. These three deflectors function properly only when they've been precisely placed and welded to exact specifications. Together they provide superior reductions in exterior sound levels as well as resonance transmitted through the exhaust system and into the vehicle.

    Learn More
  2. Flowmaster 94-97 GT / Cobra Catback System
    $635.95

    Flowmaster 94-97 GT / Cobra Catback w/ 40 Series Delta Flow Muffler

    • 2.50 Outlet, Stainless OEM Style Tips
    • American Thunder
    • Dual Out Rear



    American Thunder
    Looking for the famous, full-on "Flowmaster tone?" Look no further. This American Thunder system will deliver the aggressive tone you want, as well as the performance you demand.

    Delta Flow Technology
    Developed from Flowmaster's line of Delta Force® race mufflers, Delta Flow® technology provides superior scavenging of exhaust gases even over a comparable (standard) Flowmaster muffler. This results in increased horsepower, torque and fuel economy, along with reductions in exterior sound levels and interior resonance. These three deflectors function properly only when they've been precisely placed and welded to exact specifications. Together they provide superior reductions in exterior sound levels as well as resonance transmitted through the exhaust system and into the vehicle.

    Learn More

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