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Manley Extreme Duty E.D. exhaust valves for Chevy LS-3 / L-99 feature a 1.600 in head diameter and 0.3136 in stem diameter, offered as a set of eight for heavy-duty applications. Part of Manley’s Extreme Duty Series, they are intended for engines that require exceptional heat and force resistance and include swirl-polished underheads, chrome stems and hard tips for improved airflow, wear resistance and longevity.
Manley Chevy LS-3 / L-99 (L-92 Head) 1.600in Head Diameter Pro Flo E.D. Exhaust Valves (Set of 8)
