Clevite Case 251 267 284 301 336 Series 4 Cyl Main Bearing Set

The Clevite MS1497P20 is a P-Series main bearing set designed for high-performance engine applications, including motorsports, heavy-duty, and street performance.

The construction includes a hardened steel backing for structural support, a cast copper-lead lining to withstand extreme loads, an electroplated babbitt overlay for superior conformability, and a lead-free aluminum silicon alloy for wear resistance. Performance features include a high crush factor for retention, increased eccentricity to compensate for distortion, reduced overlay thickness to prevent fatigue, and optimized oil flow.