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The Manley Extreme Duty exhaust valves for Big Block Chevrolet are a set of racing-grade exhaust valves sized with a 1.88" head diameter and .3415" stem diameter, supplied as a set of eight for demanding applications. They’re engineered for Top Fuel, Funny Car, marine and high-stress circle track environments. Features include swirl-polished underheads, fully machined combustion faces, chrome stems, hard tips and XH-432 XtremeAlloy construction for enhanced heat and wear resistance.
Manley Big Block Chevrolet Extreme Duty Exh. Valve 1.88in. Head Dia / .3415in. Stem Dia - Set of 8
