EVO X Rally Camshafts to suit 4B11T engines fitted with a 36mm restrictor. Suits engines running 46-54mm turbo. The 214-R 260°camshaft features Kelford’s split lobe profile design on the intake to promote more efficient swirl chamber filling. Also great on street or track engines where excellent throttle response is important. Valve spring upgrade is required. Kelford Cams recommend KVS11 for up to 32psi boost and 9000rpm.