Clevite MS-2334H-.25MM H-Series Engine Crankshaft Main Bearing Set 0.25mm Undersize

The Clevite MS-2334H-.25MM H-Series Main Bearing Set is a 0.25mm undersize tri-metal crankshaft main bearing set engineered for competition and high-performance engine applications. Originally developed for NASCAR racing, the H-Series line is well suited to a broad range of performance and racing builds that operate in the medium-to-high RPM range.

These bearings feature a hardened steel back with a carefully selected thin overlay and are constructed without flash plating for improved seating and more consistent bearing-to-journal contact. A medium level of eccentricity optimizes oil flow and load distribution across the bearing surface, while the high crush design ensures precise positioning and eliminates unwanted movement within the bore.

Key Features:

• 0.25mm undersize — designed for use with reground or undersized crankshafts
• High crush — locks bearings securely in their housing bores
• Enlarged chamfers — provides greater clearance for oversize crankshaft fillets
• Medium eccentricity — promotes optimal oil film distribution under load
• No flash plating — improves initial seating and bearing break-in
• Hardened steel back with thin overlay — balances durability and conformability
• Designed for medium-to-high RPM engine operation
• Originally developed for NASCAR racing applications

The Clevite MS-2334H-.25MM is the ideal choice for engine builders performing a crankshaft regrind where 0.25mm undersize bearings are required, whether for a performance street build or a dedicated competition engine.