Manley Severe Duty Exhaust Valve - 1.600 in Head - 0.342 in Valve Stem - 5.036 in Long - Small Block Chevy - Set of 8 11539-8 359606 Since 1966

Since 1966

4 in Diameter Body 20 in Long

Large diameter 7/16"-20 balance bar

CARB RECOMMENDATIONS: Holley #0-4412 (500 cfm)

and they’ve kept rod ends from seizing up and kept their cars free and more consistent

Manley Severe Duty Exhaust Valve - 1.600 in Head - 0.342 in Valve Stem - 5.036 in Long - Small Block Chevy - Set of 8 11539-8 359606 Since 1966SEVERE 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