Clevite MS-429H-10 H-Series Main Bearing Set for Chevrolet

The Clevite MS-429H-10 is a high-performance H-Series main bearing set designed for competition engines and demanding racing applications. Developed primarily for NASCAR-type racing, these bearings deliver the durability and precision required for high-RPM engines while providing optimal oil film characteristics for maximum bearing life.

H-Series Performance Features:

• Medium eccentricity design for optimal load distribution and contact patterns
• High crush construction ensures maximum bearing retention
• Hardened steel backing provides exceptional strength and fretting resistance
• Thin overlay reduces risk of overlay fatigue and hen tracking
• Enlarged chamfers accommodate crankshafts with oversized fillets
• Standard 180-degree upper shell grooving for optimal oil delivery to connecting rods
• No flash plating for improved seating characteristics

Advanced Bearing Design:

This bearing set features Clevite's proven TriMetal construction with a 180-degree groove in the upper main shell, which testing has shown to be the optimal design for performance engines. The upper shell groove efficiently supplies oil to connecting rod bearings while the ungrooved lower shell maintains a thicker oil film for improved load capacity and bearing life. The lower bearing half experiences the highest loads and benefits from the continuous oil film that ungrooved surfaces provide.

Application Guidelines:

H-Series bearings are the ideal choice for engines with crankshafts featuring oversize fillets and those operating in medium to high RPM ranges. Use these bearings when contact patterns obtained with higher eccentricity P-Series bearings are too narrow—ideal contact patterns should cover 2/3 to 3/4 of the bearing surface. If you're uncertain which performance bearing series to select, H-Series bearings are the recommended starting point for most racing applications.

This main bearing set is specifically engineered for Chevrolet engines and represents decades of bearing development and racing experience from Clevite 77, the trusted choice of engine builders worldwide.