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The Manley Extreme Duty exhaust valve for Chevrolet small block engines is engineered for extreme-force and high-heat applications like Top Fuel, Funny Car, marine big blocks and restricted circle‑track small blocks. Built from XH-432 XtremeAlloy with chrome stems, hard tips and swirl‑polished underheads, it features fully machined combustion faces to enhance airflow and longevity in severe service. Spec: 1.600 in head, 5.365 in overall, 0.3415 in stem.
Manley Chevrolet Small Block Exhaust Valve Kit - 1.600in Head Dia. 5.365in O/A Length, 0.3415in Stem
