SLP’s Mustang Loud Mouth™ has always been the best performing cat-back exhaust in the business. Now it’s the most versatile, too! Using groundbreaking modular technology first seen on our Mustang X-pipes, we’ve developed a system that can be quickly reconfigured to fit changing performance, noise level, and sound quality requirements. Simply loosen a few band clamps, swap muffler types, retighten, and you’re done. No other system offers this level of performance and adaptability!

Along with the included resonators, the Mustang Loud Mouth™ system is compatible with two all new SLP mufflers, the bullet-type Loud Mouth II™ race unit (#31064) and the traditional-style PowerFlo™ (#31065). Buy all three for complete control over your Mustang’s sound and performance characteristics.

NOTES: Includes Loud Mouth™ resonators. Loud Mouth II™ and PowerFlo™ mufflers sold separately.

FEATURES:
Includes our infamous Loud Mouth™ resonators for virtually zero flow restriction and the meanest sound around
Employs SLP’s exclusive modular technology, making it possible to switch between muffler and resonator types in a matter of minutes
Dyno-proven to out-perform competitive resonator-type exhausts
Engineered and built to OEM standards to ensure proper fit
Constructed entirely from mandrel-bent stainless steel
Features show quality polished resonators and 3.5" double-wall tips with electromarked SLP logo
For 1999-2004 GT and Mach I models