Manifold

The change of exhaust manifolds (from the usual castings to stainless steel) allows that, in similar sections of passage, the exit of gases is easier due to its less friction in the exhaust. This allows a better emptying and, therefore, filling of the cylinder capacity, achieving high speeds with little sacrifice.

As engines become more efficient early on, losses from exhaust systems become more noticeable. A properly designed exhaust manifold is essential to improve engine performance.