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This Manley Extreme Duty exhaust valve is specified with a 1.800 in head, 5.930 in overall length and a 0.3415 in stem, built for the most demanding racing and marine environments. The Extreme Duty Series targets Top Fuel, Funny Car, Big Block Chevy marine and restricted circle-track Small Block Chevy use. Swirl-polished underheads, fully machined faces, chrome stems and hard tips enhance flow and long-term durability.
Manley Chevrolet Big Block Exhaust Valve Kit - 1.800in Head Dia. 5.930in O/A Length, 0.3415in Stem
