Exhaust Valve. Fits Evolution Big Twin 1984-99. High Flow.
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* Highest flow level on the market.
* One piece forged racing grade stainless steel alloy.
* hard black nitride finish.
* bearing quality hardened tip at the end of the stem to prevent premature wear with high-lift applications.
* 45o angle below the lock groove to facilitate the valve seal installation.
* Heat treated with a special process.
* stem is centerless ground for longer life.
* Dished Valve
Head Dia = 1.610in.
OAL = 4.525in.
Stem Dia = 0.3106in.
