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The Manley Extreme Duty exhaust valve for GM 6.6L Duramax Diesel applications is built for the most demanding drag and marine engine environments. Optimized for applications where extreme heat and force are present, these valves use Manley’s XH-432 XtremeAlloy and feature swirl‑polished underheads, fully machined combustion faces, chrome stems and hard tips to improve airflow, combustion efficiency and resistance to wear in high‑stress conditions.
Manley GM 6.6L Duramax Diesel Exhaust Valve Kit 1.300in Head Dia. 4.985in O/A Length, 0.2735in Stem
