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SLP M31023 - SLP Mustang Cat-Back / Axle-Back Exhaust Systems

SLP M31023 - SLP Mustang Cat-Back / Axle-Back Exhaust Systems


Loud-Mouth Axle-Back Exhaust System
  • 2011-14 Mustang GT 5.0L
  • 2011-14 Mustang GT 500

    SLP M31023 - SLP Mustang Cat-Back / Axle-Back Exhaust Systems Details

    Axle-Back Exhaust Systems

    Your 2011-12 Mustang GT 5.0/Shelby GT500 packs a thoroughbred of an engine, why bottle it up with restrictive, wimpy-sounding stock mufflers? Unleash the Pony within, with a Loud Mouth™ rear-axle back exhaust system from SLP Performance Parts. This affordable, easy-to-install kit eliminates the factory mufflers entirely, drastically reducing backpressure for enhanced power and a mind-blowing performance sound. Nothing else even comes close! Combined with our 4" polished tips, you'll really feel and hear the difference!

    Key Features:

  • Mandrel-bent 3" tubing offers unbeatable flow characteristics
  • Significantly lighter than the OEM muffler assembly
  • Installs in under an hour
  • Constructed entirely from stainless steel
  • Hand-polished, 4" dual-wall tips provide a show-quality appearance
  • Emissions legal in all 50 states
  • Includes pre-welded hangers, detailed instructions, and all necessary installation hardware
  • Covered by SLP's Performance Guarantee and limited lifetime warranty

  • SLP M31023 - SLP Mustang Cat-Back / Axle-Back Exhaust Systems

    SLP's 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 the Mustang X-Pipes, SLP has developed a system that can be quickly reconfigured to fit changing performance, noise-level, and sound-quality requirements. No other system offers this level of performance and adaptability!


  • Employs SLP's exclusive modular technology, making it possible to switch between muffler and resonator types in a matter of minutes
  • Dyno-proven to outperform competitive resonator-type exhausts
  • Engineered and built to OEM standards to ensure proper fit
  • Constructed entirely from mandrel-bent 409 stainless steel.

    Loud Mouth Systems: Provide virtually zero flow restriction and the meanest sound around.

    Loud Mouth II Systems: Provide minimal restriction, reduced resonance, and an aggressive tone.

    PowerFlo Systems: Provide superior performance; minimal resonance; and a deep rich tone.