1999-2004 Mustang GT / Mach 1 Flowmaster Exhaust System (Stainless) 817312

Huge New Flowmaster Exhaust Sound with Improved Performance

No one does Mustang exhaust systems quite like Flowmaster, and their awesome American Thunder Cat-Back Exhaust Kit is just the thing your Fox Mustang needs to get an absolutely vicious tone along with a nice bump in performance. The American Thunder system includes a set of Flowmaster mufflers and more efficient exhaust tubing together into one kit to give your Mustang a deep, throaty tone just like a classic muscle car. The kit is an easy, direct bolt-on replacement for your stock cat-back kit for quick gains in sound and power.

Fits The Following Models:

• 1999-2004 Ford Mustang GT
• 2003-2004 Ford Mustang Mach 1

409S Stainless Steel Construction

The American Thunder kit features two performance mufflers, tailpipes, and exhaust tips for both great sound and looks. The aggressive exhaust tone is brought to you by a pair of Flowmaster Super 44 mufflers which have a two-chamber design mated with Flowmaster's unique Delta Flow system for a deep, throaty, and noticeable roar. The kit's dual tailpipes use 16-gauge, 2.5" diameter, mandrel-bent tubing to promote efficient exhaust flow out of your Pony. The kit comes with 2.5" polished tips embossed with the Flowmaster logo. This kit is manufactured out of 409S stainless steel right here in the USA and is backed with a Limited Lifetime Warranty.

Aggressive Muscle Car Sound

This version of Flowmaster's classic, loud and proud American Thunder cat-back system comes in pristine 409 stainless steel construction, perfectly suited for those 1999 to 2004 Mustang GT or 2003 to 2004 Mach 1 Mustang owners who have to deal with high humidity and salted roads during the winter. The American Thunder cat-back greatly improves the exhaust note of your Pony over its standard exhaust, giving it back at least some of that old-school muscle car rumble sorely missing from modern Mustangs.

Stainless Steel System

Flowmaster uses 2.5" diameter mandrel-bent tubing for the construction of it's American Thunder kit that helps to free up some of the back pressure in your stock exhaust system to get you more sound. The kit comes standard with aggressive 3" tips that give the rear of your 1999 to 2004 Mustang a mean, new look. This kit is designed as a direct replacement for your factory cat-back exhaust system and will hook up to your Mustang's stock mid-pipe.