Exhaust Valve. Fits Twin Cam 1999-2004. OEM Replacement.

* Stock length & head diameter

* 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 # 18074-83

Head Dia = 1.570″

OAL = 4.525″

Stem Dia = 0.3106″

* Replaces OEM # 18085-99

MFR PART No: AV-HD12
REVELRY PART No: AV-HD12