Reuses Stock Cats. Installation of the Flowmaster American Thunder Catback Exhaust requires cutting the factory H-pipe to bolt up the new Scavenger X-Pipe directly behind the stock factory catalytic converters making your Mustang 100% smog-legal.
Race Car Growl. The included Scavenger X-Pipe not only helps increase power, but it also adds a load raspy, race car growl to the sound of your exhaust with its modern "X" crossover pipe design.
Quality Construction. Constructed from durable 2.5" 16 gauge 409 stainless steel tubing for it's corrosion resistant properties the Flowmaster American Thunder Catback features two 60 Series Delta Flow American Thunder mufflers with massive 4.0" diameter polished stainless steel tips for great muscle car looks and sound. As an added bonus the tips are embossed with the "Flowmaster" logo for true custom styling.
Application. This Flowmaster American Thunder Catback exhaust system is designed to fit the 2005 to 2010 GT, Bullitt and the 2007-2010 Shelby GT500 Mustangs for both great looks and great sound.
Americanmuscle recommends adding the 2005+ Mustang 304 Stainless Steel Exhaust Hanger Kit from the drop down option above, to provide more strength, stability and a cleaner installed appearance. If you have a 2007 Mustang you may need the kit for correct installation. Click here for details.