Clevite MS2259H25MM - Ford Modular 4.6L H-Series Main Bearings for Aluminum Blocks 1/2 Grooved - .010" Undersize

We recommend the Clevite 77 H-Series Main Bearings over the P-Series for all Modular Engine Builds. Clevite H-Series Main Bearings were developed primarily for NASCAR racing, but are well suited to other types of competition engines. They're especially good for engines that run at medium-to-high revs. They have steel backings with carefully selected overlays and a high crush factor, plus a medium level of eccentricity. H-Series bearings have enlarged chamfers at the sides for greater crank-fillet clearance, and are made without flash plating for better seating.