4G63 EVO 4-7 Cams | 4-TX258258 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. Street Strip Circuit Race Road Race E85 Rally
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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.