Manley Extreme Duty Exhaust Valve - 1.880 in Head - 0.342 in Valve Stem - 5.522 in Long - Big Block Chevy H775C15XL 80 Series Cross

80 Series Cross

Moroso LS Valve Cover Adapter

These cylinder heads do not require offset rockers of any kind

Air-Gap design features an open air space under the plenum

Manley Extreme Duty Exhaust Valve - 1.880 in Head - 0.342 in Valve Stem - 5.522 in Long - Big Block Chevy H775C15XL 80 Series CrossProduct Description: Exhaust Valve Extreme Duty 1. 880 in Head 0. 342 in Valve Stem 5. 522 in Long Stainless Big Block Chevy Sold Individually Manley Performance high performance and racing engine parts have been powering winners since 1966. Since our inception in March 1966, Manley Performance Products has been at the forefront of the high performance automotive industry. Founded by gearhead Hank Manley shortly after his graduation from Brown