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The Manley Severe Duty intake valve for Chevrolet big-block engines has a 2.065in head diameter, 5.218in overall length and a 0.3720in stem, built for demanding, high-heat powerplants. Manley uses NK-844 intake alloy and finish processes including swirl polishing and machined combustion faces, with chrome stems and hard tips to improve airflow, reduce wear and extend longevity under severe operating conditions, supported by exhaustive fatigue testing across the valve family.
Manley Chevrolet Big Block Intake Valve Kit - 2.065in Head Dia. 5.218in O/A Length, 0.3720in Stem
