Unobtrusive way to increase performance without having to invest in a new complete exhaust system. On most Enduro shift mopeds with D50B0 engines, the exhaust is split in two and has a so-called resonance pipe on the manifold, which reduces the engine power. If you now replace the manifold with a version without this resonance tube, the engine turns out further and releases more power.
Less expensive than the stainless steel version.