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. The Street Slayer uses a smaller, less obtrusive muffler for a more stylish look, and even more sound.

• Simple installation
• Increases power across entire rev range
• Manufactured from high carbon fiber
• Stainless steel Midpipe eliminates catalytic converter
• Significantly lighter than OEM exhaust
• Quiet inserts available
• All M4 mufflers are fully rebuildable