Ferrea 6000 Series Exhaust Valve - 1.600 in Head - 11/32 in Valve Stem - 5.010 in Long - Small Block Chevy - Set of 8 F6145-8 57120BK and what a difference they

Ferrea 6000 Series Exhaust Valve 1.600 in Head 11 32 in Valve Stem 5.010 in Long Small Block Chevy Set of 8 F6145 8 57120BK and what a difference they and what a difference they make Features:Designed to fit low in the block to clear firewall and intake combinationsSupplied with bronze gearSupplied with large diameter HEI style distributor cap and rotorMust be used with an MSD Crank Trigger and MSD Ignition ControlO ring seals can be added to modified blocks to improve oil pressure controlSpecial oil tract improves lubrication to the distributor and cam gearShaft is guided by a sealed ball bearing and an extra long sintered bushingOversized polished steel shaft with a QPQ coating for friction reductionAdjustable slip collar mounting flange for engines with modified deck heightsCNC machined billet aluminum housing and Dupont Rynite base