258/264 - 10.50mm/10.50mm Valve Lift
258 cams for fast street engines with stock turbo or turbocharger upgrade. Suits upgraded turbo sizing 48-54mm. Improved low to mid-range power and good throttle response. Also suits restrictor plate rally engines. For up to 8000rpm and 25psi boost Kelford Cams recommend valve spring KVS63.