Manley Severe Duty Stainless Exhaust Valve - 1.900 in Head - 11/32 in Valve Stem - 6.380 in Long - Big Block Chevy (Set of 8) Bedrug NOTE: Figure B

NOTE: Figure B

6 in Oval Port

Impedance: 150

78-90 J20 Pickup

Ramp profile or shape controls the "timing" of the shot

Manley Severe Duty Stainless Exhaust Valve - 1.900 in Head - 11/32 in Valve Stem - 6.380 in Long - Big Block Chevy (Set of 8) Bedrug NOTE: Figure BManley Valve Exhaust, Valve BBC PONT S D 1. 900. Product Description: Exhaust Valve Severe Duty 1. 900 in Head 11 32 in Valve Stem 6. 380 in Long Stainless Big Block Chevy Set of 8 Manley Performance high performance and racing engine parts have been powering winners since 1966! Manley Budget Replacement Valves are better than stock valves. Manley Budget Performance Valves are for the value conscious engine builder. Manley Street Master Valves are