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.

Honda's pocket-sized fun machine, the Grom has provent to be insanely popular amongst racers, street rider, and customizers alike.  M4 brings its exhaust expertise to the miniscule missile, uncorking a full 5% more power and removing 37% while giving it race-inspired looks and sound. 

• Low mount muffler cleans up tailsection
• Stainless Steel construction
• Satin black ceramic coated finish
• Includes removable dB killer insert
• 5% gain in power
• 37% reduction in weight