Clevite MS-2259H-.25MM H-Series Performance Main Bearing Set

The Clevite MS-2259H-.25MM is a high-performance engine crankshaft main bearing set designed for demanding engine builds. This 0.25mm undersize bearing set is part of Clevite's renowned H-Series line, engineered specifically for medium to high RPM applications.

Key Features:

• Medium level of eccentricity for optimal load distribution
• High crush design ensures superior retention and seating
• Hardened steel backing for exceptional strength and durability
• Thin overlay construction for improved conformability
• No flash plating for better initial seating and break-in
• 0.25mm undersize for use with undercut crankshafts

Clevite H-Series bearings are specifically engineered for performance engines with oversize crankshaft fillets and operating in medium to high RPM ranges. The hardened steel back provides the structural integrity needed for high-load applications, while the thin overlay allows the bearing to conform to minor surface irregularities. The absence of flash plating promotes faster and more effective seating during initial engine break-in.