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? High Performance BMW M Series S58 Engine 292¡ã/280¡ã | 10.40mm/10.60mm Valve Lift Stage 2 racing cams for professionally built BMW S58 engines that can deliver 800hp to 1400hp with 66-75mm turbo sizing and aftermarket intake plenums. • The cams enable full use of Valvetronic and Dual VANOS while allowing you to lock Valvetronic when using an aftermarket throttle body. (Please check valve-to-piston clearances on full travel of VANOS and Valvetronic). • Upgrade valve springs with Kelford Cams¡¯ KVS58-BT. • Ensure the clearance of the new racing cam lobe with the intake intermediate rockers and trim or deburr OEM pressed steel rockers if necessary. The 358-B has had many independent tests completed by various engine builders check out the latest cam swap dyno test.