Clevite Chevrolet 327 350 400 LS1 SBC Rod Bearing Each STD Narrow H Series Coated CB-663HNC

Clevite H-Series 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, a high crush factor, and 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. 
If you know which type of performance bearing to start with, the H series bearing will be your best choice.