Perfect Circle MS805P Engine Main Bearing Set Standard Size

The Perfect Circle MS805P is a high-quality engine crankshaft main bearing set designed for professional engine rebuilds and restorations. Now manufactured under the Clevite/MAHLE brand family, this bearing set represents decades of engineering excellence in engine bearing technology.

Advanced Tri-Metal Construction:

• Steel backing provides exceptional strength and dimensional stability
• Copper-lead intermediate layer withstands extreme loads and engine distortion
• Electroplated babbitt overlay delivers superior bearing surface characteristics
• Features 1/2 groove design with full grooved bearings for enhanced oil distribution

Part of the legendary Clevite 77 bearing family, these P-Series main bearings are engineered for high-revving engines and demanding applications. The design incorporates higher eccentricity and increased crush factor to compensate for high-load conditions and crankshaft deflection during operation. This tri-metal construction provides an ideal combination of conformability, embedability, slipperiness, and fatigue resistance that surpasses many original equipment bearings.

• Full grooved upper bearings for optimal lubrication
• One half-grooved bearing for specific journal position

Ideal for engine rebuilds where reliable performance is critical, including street performance, heavy-duty applications, and motorsports. This bearing set is suitable for most OE replacement applications and provides the quality assurance backed by decades of proven performance in professional racing and demanding automotive applications.