Perfect Circle MS829P10 Main Bearing Set 0.010" Undersize Big Block Chevy

The Perfect Circle MS829P10 is a premium P-Series main bearing set engineered for Chevrolet big block V8 engines. This set features 0.010" undersize bearings designed for crankshafts that have been machined 0.010" under the standard journal diameter, making them ideal for engine rebuilds and restorations.

Key Features:

• P-Series tri-metal construction with steel backing for superior strength and durability
• Intermediate copper-lead alloy layer provides excellent load-bearing capacity
• Electroplated lead-tin-copper overlay on running surface ensures optimal wear characteristics
• Half-groove design for enhanced oil distribution throughout the bearing surface
• Higher eccentricity and crush factor compensates for high-load factors in performance applications

Fits Chevrolet and GMC big block V8 engines from 1965-2000, including 366, 396, 402, 427, 454, and 502 cubic inch displacements. Standard shaft diameter: 2.2983"-2.2993" (bearings 1-6).

Technical Specifications:

• Crankshaft Undersize: 0.010 inch (0.25mm)
• Material: TM-77 tri-metal construction
• Bearing Style: Half-grooved for improved oiling
• Includes: MB-3135P bearings (positions 1-2-3-4-5-6) and MB-2588P(F) thrust bearing (position 7)

Clevite P-Series bearings are renowned for their exceptional combination of conformability, embedability, and fatigue resistance, making them a trusted choice for both professional engine builders and serious enthusiasts. Perfect Circle is a premium bearing line from Clevite MAHLE, backed by decades of engineering excellence and OEM-quality manufacturing standards.