Manley Severe Duty Exhaust Valve - 1.900 in Head - 0.342 in Valve Stem - 5.522 in Long - Big Block Chevy - Set of 8 11811-8 R07C08 They were the ultimate power

They were the ultimate power statement when they came factory on cars like the 1967 427 Corvette

15┬ ¼Î“ê₧ or 20┬ ¼Î“ê₧ of retard while the engine is cranking

1992-1995 GMC K2500

The lightweight 1" tubes

Manley Severe Duty Exhaust Valve - 1.900 in Head - 0.342 in Valve Stem - 5.522 in Long - Big Block Chevy - Set of 8 11811-8 R07C08 They were the ultimate powerProduct Description: Exhaust Valve Severe Duty 1. 900 in Head 0. 342 in Valve Stem 5. 522 in Long Stainless Big Block Chevy Set of 8 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 University, our