258° cams for fast street 4G63 engines with stock turbo or turbocharger upgrade. Suits upgraded turbo sizing 48-54mm. Improved low to mid-range power and good throttle response. Suits restrictor plate rally 4G63 engines. For up to 8000rpm and 25psi boost Kelford Cams recommend valve spring KVS63._x000D_\n_x000D_\n
