Head Gasket Cmf-20 W/Fire Ring Shovelhead 1966/L, 3-1/2″ Bore Rpls Hd 19770-66B Mfg# C9604-1

Description

Head Gasket Cmf-20 W/Fire Ring Shovelhead 1966/L, 3-1/2″ Bore Rpls Hd 19770-66B Mfg# C9604-1

• CM-20 is a perforated steel core gasket which allows heat to be drawn away from the combustion ring while dissipating heat evenly across the gasket surface
• Hot spots that lead to head gasket failure are eliminated
• CM-20’s elastomer surface provides maximum sealing characteristics and sealing around passages that carry oil
• All gaskets listed are .043 thick and feature a steel fire ring at the combustion area to help prevent blown head gaskets

Cometic
Head Gasket (Each)
3 7/16 or 3 1/2 (Stock Bore)
Fits Shovelhead 1966/1984
Replaces HD# 16770-66B