Tomei Exhaust Manifold - Mitsubishi EVO 7, 8, 9Holding the same quality as our other Expreme exhaust components, this 4G63 EVO exhaust manifold is a perfect balance of ingenuity and is more efficient through numerous R & D testing. In the early stages of development, we worked with the original exhaust manifold to find the true limits of the factory production piece. After gathering numerous data from the original equipment tests, we slowly pieced together our Expreme exhaust manifold. The 4G63