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 GSX-S 1000 provides suzuki's legendary power with a chassis that provides all day comfort.  M4 Exhaust helps add that racetrack power and sound to your GSX-S, while reducing weight and improving looks.  M4's Black GP full system features a muffler design inspired by the latest MotoGP systems in ceramic coated satin black, satin, stainless steel headers, 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
• Eliminates catalytic converter
• Eliminates SET exhaust butterfly valve
• 9hp increase in power
• Nearly 11 lbs lighter than OEM muffler
• Includes removable dB killer insert
• All M4 mufflers are fully rebuildable