Exhaust Valve. Fits Evolution Big Twin 1984-1999. High Flow

* 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 = 1.610"

OAL = 4.525"

Stem Dia = 0.3106"