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

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Other manufacturers purchase titanium from metal brokers and produce

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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 theyThe 6000 Series Competition Valves are designed to provide excellent reliability in an environment of high spring pressures and roller cams, at a budget price. They have higher fatigue resistance and tensile strengths than our competitor's best offerings. These valves can be used in Drag and Oval Track racing applications. To manufacture the valves Ferrea uses an exclusive two step slow forging process using EV8 stainless steel on both intake and