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The Manley Extreme Duty exhaust valve for Chevrolet small block engines meets specialized demands for high-heat, high-force racing and marine environments. Constructed from XH-432 XtremeAlloy with chrome stems and hard tips, it uses swirl‑polished underheads and machined combustion faces to boost airflow and resist wear during extreme operation, making it suitable for Top Fuel, Funny Car, marine and restricted circle‑track applications. Spec: 1.625 in head, 5.065 in overall, 0.3415 in stem.
Manley Chevrolet Small Block Exhaust Valve Kit - 1.625in Head Dia. 5.065in O/A Length, 0.3415in Stem
