M4 Performance Exhaust designs and manufactures high quality exhaust systems for all popular sport bikes. They create full systems and slip-ons that are dyno-tuned with precision for optimal performance and sound.

Suzuki's flaghip sportbike, the legendary GSX-R line has ruled the racetrack since its inception in 1985.  M4 Exhaust helps add that racetrack power and sound to your GSX-R, while reducing weight and improving looks.  M4's Black GP slip on features a ceramic coated satin black muffler with megaphone styling based on MotoGP exhuast systems, as well as the performance and sound M4 is known for.

• Simple installation
• Increases power across entire rev range
• Manufactured from high quality stainless steel
• Significantly lighter than OEM exhaust
• Includes removable dB killer insert
• All M4 mufflers are fully rebuildable