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The 4" Extension is required to clear the harmonic balancer on Small Block Chevs and the 6" extension is used in blown applications to bring the pump out past the blower belt
906-08-M12S
Steel Pre-Flattened O-Ring Head Gasket 1031R FE1031R Suit Ford 302 SVO-351W SVO
Hex Head S/Sfits Stamped Steel Valve Covers 1/4-20 Thread x
This should be ordered according to the size of your lower hose connection
4G63 VR4 EVO 1-3 Cams | 1-TX278 Product:4G63 VR4 EVO 1-3 Cams | 1-TX278 The 4" Extension is requiredSuits 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
