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 Approved**Direct Plug in Harness use

Approved**Direct Plug in Harness use PN 8876 when installing CD Ignition Unit**

4 in Diameter Body 20 in Long

Since 1966

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

9 Power Outlets

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 Approved**Direct Plug in Harness useSEVERE 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