Description
Supertech 4age 20v +1mm Oversize valve set
Suit both Silvertop & Blacktop (12x Intake Valves, 8x Exhaust Valves)
A direct install of these valves with the correct seat cutting will instantly net 6cfm flow gain on the intake and 15cfm on the exhaust with no other mods
Black Nitrided Intake Valve
- Head Diam: 27.50mm (+1.0)
- Stem Diam: 4.96mm
- Undercut / 30 Backcut
Black Nitrided Exhaust Valve
- Head Diam: 27.00mm (+1.0)
- Stem Diam: 4.97mm
- Length: 108.40mm
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