S63TU OUTLAW ENGINEThe S63 engine is not designed to have large increase in boost. DMVBMW has designed a high performance engine to handle very high outputs by utilizing higher quality racing components. This engine includes Forged Carrillo connecting rods, CUSTOM PISTONS, CUSTOM CYLINDER SLEEVES, high performance valve job, and new intake and exhaust valve guides. This Engine includes new timing chains, chain guides, tensioners, new race bearings, seals and gaskets.