Perfect Circle MS829H Main Bearing Set Big Block Chevy Standard Size

The Perfect Circle MS829H is a high-performance main bearing set designed for Big Block Chevrolet engines, including 366, 396, 402, 427, 454, and 502 cubic inch V8 applications from 1965-2000. Part of the renowned H-Series bearing family from MAHLE Clevite, this bearing set delivers track-proven performance and durability for both street and racing applications.

H-Series TriMetal Construction:

• Hardened steel backing for maximum support and strength
• Cast copper-lead substrate with copper/tin/lead overlay for superior load capacity
• Medium level of eccentricity with high crush for optimal seating
• Thin overlay design for excellent conformability and embedability

Performance Features:

• Enlarged chamfers at bearing sides provide greater crankshaft fillet clearance
• Manufactured without flash plating for better seating characteristics
• Engineered for medium to high RPM engine operation
• Standard size bearings with bore dimensions of 2.9370-2.9380 inches
• Maximum wall thickness of 0.093 inches

H-Series bearings are the ideal choice for engines with oversize crankshaft fillets and high-performance applications. Whether building a stock replacement or a high-horsepower racing engine, these bearings provide the reliability and durability demanded by professional engine builders and enthusiasts. Clevite bearings have won more motorsports championships than any other brand, making them the trusted choice for critical engine components.