The ACL main bearing set serves Pontiac 4‑cylinder 151 engines (1977–1993) and Chevy 4‑cylinder 153ci engines (1962–1970), providing main journal support for both applications. It restores correct crankshaft clearance and rotational stability during rebuilds or repairs. Select this kit when working on the listed Pontiac or Chevrolet small‑displacement engines within those year ranges.

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