Akrapovic Slip-On Exhaust Yamaha R3 Features Carbon Fiber muffler / Carbon Fiber Tip No fuel remapping required. For optimal performance J&P Cycles recommends use of a fuel controller A combination of beautiful machine and hand welds Patented hexagonal muffler CNC machined muffler inlet cap Optimized to maximize lean angle All carbon fiber parts are produced in-house Air-tight quality controlled production means your exhaust will be perfect High-quality, silicon-shielded stainless steel exhaust springs