Yoshimura R&D has now developed the RS4 for the road — a design that provides an unrivalled combination of power and a quiet exhaust note. The RS4 features a Pentagonal aluminium muffler sleeve, stainless tail-pipe and carbon fibre coned end-cap.
The front end-cap has a noise reducing Polyresonant duplex chamber. All parts required for fitment are included (fittings/link pipe etc.) with full fitting instructions and is developed to fit without fuel modification. Race, Removable Baffle