Perfect Circle MS617P10 Main Bearing Set 0.010" Undersize Chevy Inline-6

The Perfect Circle MS617P10 is a premium main bearing set designed for Chevrolet and GMC inline-6 engines including 194, 230, 250, and 292 cubic inch displacements produced from 1963 to 1989. This bearing set is engineered for 0.010 inch crankshaft undersize applications.

Key Features:

• P-Series tri-metal construction with steel back, cast copper-lead intermediate layer, and electroplated babbit overlay
• Higher eccentricity and crush factor design to compensate for high-load factors and engine distortion
• 1/2 groove oil distribution pattern for enhanced lubrication
• TM-77 specification for demanding performance applications
• Ideal for engine rebuilds with heavy-duty, motorsports, or street performance use

P-Series bearings provide superior conformability, embedability, and fatigue resistance compared to original equipment bimetal bearings, making them an excellent upgrade choice for rebuilt engines. The tri-metal design offers increased load capacity and durability for engines operating under high-revving or demanding conditions.