GM V8 Point Type Marine Distributor | Sierra 18-5313-1GM V8 Point Type Marine Distributor Sierra 18 5313 1 Sierra Mallory breaker point style distributor for GM small and big block marine engines. GM point type distributor with mounting gasket For most GM V8 small and big block engines Not for 348, 409, and tall deck big block engines SAE J1171 certified for use in marine applications Replacement tune up kit P N 18 5251 Replacement tune up kit with cap P N 18 5271 Replacement cap P N 18 5376 Replacment