For use with 18 deg heads that have perimeter bolt patterns with offset spacing.RPM sheetmetal valve covers feature billet cnc 1/2″ thick 6061 aluminum rails, and hand formed 5052 aluminum bodies for an outstanding seal and appearance. Will clear any rocker arm combination.Valve covers come with 1.75″ billet oil fill cap. AN / NPT bungs available at an additional cost.
 
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