Flowmaster – Cat-back System ‘99 - ‘04 Ford Mustang GT 4.6L / Mach I / Bullitt, AMERICAN THUNDER®

Looking for that great go-fast sound from your 1999-2004 Ford GT, Mach I or Bullitt Mustang? Now owners of these great muscle cars have the choice of standard aluminized kit construction or Flowmaster’s new 409S™ stainless steel kit (PN817312). Both kits deliver that great Flowmaster signature sound, improved throttle response and increased performance.  Featuring Super 40 mufflers, this American Thunder system provides an aggressive tone both inside and outside the vehicle. The new kit also incorporates all of the benefits of the standard aluminized steel kit including the polished stainless tips that exit through rear valence cutouts as in the OE configuration. A total bolt on installation that does not require welding, the kit uses the factory hangar mounts and includes zinc-plated clamps for long durability.

• Complete 409S® Stainless Steel Cat-back kit

• True bolt on installation – no welding required

• Terrific Flowmaster American Thunder® sound

• Uses 409S® stainless steel Super 40™ mufflers

• 2.50” mandrel bent tubing