Hi all, Ive got a 2011 Cooper Hatchback 6spd Manual and I am looking to upgrading it. I was wondering how the OEM upgrades match against Aftermarket. And also if I were to go to OEM (for sake of warranty) how I would go about doing that, as most of the engine upgrades i see are for the S models. Any advice and tips would be greatly appreciated. As of now my Mini is stock performance. Next step? Thanks!