Yasuni is one of the market leaders in the production of high-quality, high-end racing 2-stroke exhaust systems. These decades of experience have also lead to the only 4-stroke exhaust system that has a manifold made from a number of individual items. The use of different cones and different diameters in the manifold allows best possible gas flow together with optimum power output. The advantages at a glance: greater engine performance, a weight saving about 40% compared with the original exhaust, AISI-304 stainless steel, silent block supported mount, excellent sound thanks to the special resonance chamber