ACL Race Series main bearing set for Pontiac four-cylinder and select Chevrolet four-cylinder 153 ci applications covering various years (1977–1993 for some Pontiac engines and 1962–1970 for Chevrolet 153 ci). This race-oriented crankshaft main bearing set supplies matched main shells for engine builds and rebuilds where higher-duty race components are specified. Use for rebuilds that call for Race Series mains in the listed Pontiac and Chevrolet engines.

ACL Pont. 4 151 1977-93 Chev 4 153ci 1962-70 Race Series Engine Crankshaft Main Bearing Set