Akrapovic Racing Exhaust System Yamaha Fz-09 / Mt-09 / Fj-09 / Tracer 900 / Xsr900 Features: High quality stainless steel headers and mid-pipes A combination of beautiful machine and hand welds Patented hexagonal muffler Lightweight, compact and high-temperature-resistant carbon fiber muffler clamp 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 Note: No fuel remapping is required, but for peak performance J&P Cycles recommends use of a fuel controller.