14-17 YAMAHA FZ-09: Akrapovic Racing Full System Exhaust (CARBON FIBER) The Racing Line is a complete high-quality stainless steel exhaust system made with close attention to detail. Their unique design yields the maximum output for each specific motorcycle model while significantly reducing overall weight for top performance. Racing Line systems are identical to top-range Evolution Line exhaust systems apart from the material. Products feature a new coating for the muffler outer sleeve, providing better scratch resistance and easier cleaning. Akrapovi offers the highest quality exhaust systems for sport, motocross, enduro and supermoto motorcycles.