* Stock length & head diameter – 900 & 1000cc Ironhead Models
* Extreme Duty
* High Flow
* one piece forged racing grade stainless steel alloy.
* Liquid nitriding 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 # 18033-80
Head Dia = 1.562in.
OAL = 3.510in.
Stem Dia = 0.3389in.