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    AV&V™ Extreme Duty Replacement Valves (5/16 stem)

    These superb valves are one piece forged from a racing grade stainless steel alloy. Our liquid nitriding process creates a valve that is smoother and stronger than traditional O.E.M. or replacement valves.

    The stems are centerless grinded to a micro finish for longer life. AV&V™ Extreme Duty valves also feature a 45° angle below the lock groove to facilitate valve seal installation.

    Part number Type Head Dia. Overall Length Stem Dia. Coating Tip Length Groove Back angle tulip Note
    HD10 Exhaust 1.615” 4.525" .3106" Black nitride .200” Single 25° Stock replacement for EVO 1340
    HD11 Intake 1.845” 4.440" .3108" Black nitride .200” Single 25° Stock replacement for EVO 1340
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