Manley Severe Duty Exhaust Valve - 1.600 in Head - 0.342 in Valve Stem - 5.121 in Long - Small Block Chevy / Ford - Set of 8 Bolt - Grade 5 Includes mounting kit and illustrated

Includes mounting kit and illustrated installation instructions

4 to 7 in Drop

Fits '55-'64 GM passenger car and truck

Four 10 AN Female O-Ring Outlets

The Tester has an LCD display that clearly shows the simulated rpm

Manley Severe Duty Exhaust Valve - 1.600 in Head - 0.342 in Valve Stem - 5.121 in Long - Small Block Chevy / Ford - Set of 8 Bolt - Grade 5 Includes mounting kit and illustratedSEVERE DUTY SERIES Superior Stainless for High Temperature Gasoline Engines Exhaust Material XH 428 with Double the Ultimate Tensile Strength ( at 1500 F ) over the competition Intake Material NK 844 with 1000 Times Better Fatigue Strength than competitors offerings 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