Product Description
M4 Performance Exhaust designs and manufactures high quality exhaust systems for all popular sport bikes. We create full systems and slip-ons that are dyno-tuned with precision for optimal performance and sound.
- This system saves 15lbs over stock. It is the ultimate performance slip-on from M4. Lightest weight, best performing and a true GP racebike look. Quiet inserts are available to personally tune the noise level of your R1.
- All Titanium Tubing
- Q1 Quiet Insert Installed
- Stage 2 Q3 Quiet Insert Sold Separate
- NOTE: M4 Recommends re-flashing your stock ECU to unleash the full potential of all M4 products on the 2015 Yamaha R1.
