Clevite MS-2007H High Performance Engine Crankshaft Main Bearing Set

The Clevite MS-2007H is a high-performance crankshaft main bearing set designed for competition engines and demanding racing applications. This H-Series bearing set features optimized 180-degree upper shell grooving that maximizes oil film thickness while providing adequate oil supply to connecting rod bearings.

H-Series Performance Features:

• Medium eccentricity design for optimal load distribution and contact patterns
• High crush construction ensures maximum bearing retention under extreme conditions
• Hardened steel backing provides superior strength and fretting resistance
• Thin overlay construction prevents overlay fatigue and hen tracking
• Enlarged chamfers accommodate crankshafts with oversize fillets
• Non-flash plated for improved seating and bedding-in characteristics
• TriMetal construction delivers legendary Clevite durability

Optimized Bearing Design:

The H-Series utilizes a proven 180-degree groove in the upper main shell, which provides the best overall performance for racing applications. This design maintains maximum oil film thickness in the loaded lower bearing while ensuring adequate lubrication to connecting rods. The ungrooved lower shell develops a thicker oil film, providing greater safety margins and improved bearing life under high loads.

Application Guidelines:

H-Series bearings are ideal for engines with oversize fillet crankshafts operating in medium to high RPM ranges. These bearings work best when contact patterns cover 2/3 to 3/4 of the bearing surface. Originally developed for NASCAR competition, H-Series bearings are suitable for all types of racing engines including road racing, circle track, and high-performance street applications.

This main bearing set is the recommended starting point for most performance engine builds where you need a balance of oil flow, load capacity, and durability. The medium eccentricity provides broader contact patterns than P-Series bearings while maintaining excellent oil film characteristics.