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The Manley Extreme Duty exhaust valve for Chevrolet small block engines is purpose-built for severe-duty racing and marine uses where extreme heat and force are expected. XH-432 XtremeAlloy construction, chrome stems, hard tips and swirl‑polished underheads with machined combustion faces provide improved airflow and wear resistance for Top Fuel, Funny Car, marine and restricted circle‑track applications. Spec: 1.625 in head, 5.165 in overall, 0.3415 in stem.
Manley Chevrolet Small Block Exhaust Valve Kit - 1.625in Head Dia. 5.165in O/A Length, 0.3415in Stem
