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Exhaust Valve, 4v, 1.5mm Oversized

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1.5mm oversze Inconel exhuast valve for all 4v VW/Audi motors including 16v,20v and early 32v motors.

Back cut valve head and stem greatly increase flow, we've seen up to 20 cfm just from dropping these in an otherwise stock head. Will require upgraded larger valve seats, use with OE fit springs, retainers, guides, clips, etc.

Price each.

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