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The Manley Extreme Duty exhaust valve for Chevrolet small block engines prioritizes material strength and thermal resilience for severe applications. XH-432 XtremeAlloy construction, chrome stems and hard tips pair with swirl‑polished underheads and machined combustion faces to optimize airflow and wear resistance. Suited for Top Fuel and Funny Car drag racing, marine big blocks and restricted circle‑track small block use. Spec: 1.625 in head, 5.365 in overall, 0.3415 in stem.
Manley Chevrolet Small Block Exhaust Valve Kit - 1.625in Head Dia. 5.365in O/A Length, 0.3415in Stem
