282°/278° racing cams for the K20C4 engine. Cams suit motorsport applications such as circuit racing, roll racing and drag racing. Suits 64mm+ turbo. For professionally built engines making 700hp+. Valve spring upgrade required for high lift. For up to 9250rpm Kelford Cams recommend KVS279-BT. Valve to piston clearance needs checking. Primary exhaust lobe spec: 256° / 9.90mm