* Stock length & head diameter
* Triple Groove
* Extreme Duty
* High Flow
* one piece forged racing grade stainless steel alloy.
* Black Nitride process creates a valve that is smoother and stronger than O.E.M.
* Stems are centerless ground for a longer life
* 45o angle below the lock groove to facilitate the valve seal installation
* Replaces OEM # 18085-05
Head Dia = 1.575in.
OAL = 4.530in.
Stem Dia = 0.2755in.