4G63 EVO 4-7 Cams | 4-TX278Suits racing engines in the 400 650hp range. 54 62mm turbo size. Great with E85 and similar ethanol blend fuels. For up to 8500rpm and 35psi boost Kelford Cams recommend valve spring KVS63 BTK. Strip Drag Race Circuit Race Road Race Roll Race E85
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Suits racing engines in the 400-650hp range. 54-62mm turbo size. Great with E85 and similar ethanol blend fuels. For up to 8500rpm and 35psi boost Kelford Cams recommend valve spring KVS63-BTK.