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Clevite P-Series Main Bearings (Part Number: MS-877P) are a premium tri-metal crankshaft bearing set engineered primarily for high-revving, big-block Chrysler, Dodge, and Plymouth V8 engines. Known as part of the trusted Clevite 77 lineage, this set features high eccentricity and high crush factors. These dimensions allow the bearings to compensate for high-load distortions and severe engine flexing under high-RPM conditions.Key Specifications & ApplicationEngine Application: Fits popular Big Block \"B\" and \"RB\" engines, such as the 383, 413, and 440 wedge platforms.Bearing Material: High-strength Tri-Metal construction (TM-77 formulation).Oil Grooves: Built with full upper and lower grooves (360-degree oiling) to maximize oil flow directly to the rod bearings.Quantity: Sold as a complete vehicle engine set of 5 main bearings.Tri-Metal Layer DesignThe P-Series uses a distinct three-layer layout built to exceed standard original equipment capabilities:Steel Backing: Provides strong structural support and resists fretting or shifting in the housing bore.Cast Copper-Lead Lining: Acts as the middle structural layer to withstand extreme internal engine combustion loads.Electroplated Babbitt Overlay: An extra-thin top running surface layer engineered to minimize overlay fatigue while offering excellent slipperiness and conformability
