Engine & Performance Warehouse MS1643P010 Engine Crankshaft Main Bearing Set P-Series .010 Undersize

The Engine & Performance Warehouse MS1643P010 is a P-Series TriMetal engine crankshaft main bearing set in .010" undersize, designed for engine rebuilds requiring precision fit and enhanced durability. The P-Series TriMetal construction delivers a versatile, high-load-capacity solution suitable for standard OEM replacements as well as more demanding applications including heavy-duty, street performance, and motorsports use.

Key Features:

• P-Series TriMetal Construction – Three-layer design provides increased load capacity over bimetal bearings, making it an ideal upgrade for worn or high-stress applications
• .010" Undersize – Engineered for crankshafts that have been reground .010" under standard journal diameter
• Enhanced Embedability – Allows small particles to embed into the bearing surface rather than scoring the crankshaft journal, offering a margin of forgiveness in less-than-ideal conditions
• OE-Grade Tolerances – Manufactured to meet or exceed original equipment specifications for consistent, reliable fitment
• Suitable for Older & High-Mileage Engines – Additional embedability makes this bearing an excellent choice for engines that may not receive frequent maintenance service

The MS1643P010 main bearing set is a professional-grade component trusted by engine builders for reliable crankshaft support, reduced friction, and long service life across a wide range of gasoline engine applications.