Flowmaster American Thunder 3" Catback Exhaust System


Flowmaster's new American Thunder Cat-back system for the 2007-2010 Shelby GT500 takes performance to the next level. Developed and proven on the dyno, this dual 3.00" Mustang Catback Exhaust System maximizes the breathing of Ford's much-respected modular 5.4L 4V V8 engines, delivering increased engine power, torque and throttle response.

Fully mandrel bent, it features a Scavenger Series® X-pipe assembly for mid range torque improvement and a pair of mustang-specific 60 Series™ mufflers with Delta Flow® technology. The result is an incredibly deep, powerful exterior sound with a moderate interior sound level. The X-pipe is the cut & clamp design allowing the retention of the stock catalytic converters.

Constructed from durable 409S stainless steel and finished off with 4.00" polished tips, the system is covered by Flowmaster's 10-year warranty. The system includes everything required for easy installation including hardware and detailed instructions.

Add to Cart:

  • Model: 817494

Copyright © 2020 Evolution Performance.