Engine & Performance Warehouse MS1344P P-Series Main Bearing Set Standard Size

The MS1344P is a P-Series crankshaft main bearing set designed for small block Mopar engines, including the Chrysler/Dodge/Plymouth 318 LA and 5.2L Magnum V8 applications.

Key Features:

• P-Series construction — steel-backed with extra-thin overlays engineered to resist overlay fatigue under high-load and high-RPM conditions
• Higher eccentricity and crush factor — compensates for bore distortion common in performance and high-revving engines
• Full-groove design — ensures consistent oil distribution around the full circumference of the bearing journal
• Tri-metal composition — combines a steel backing, intermediate layer, and precision overlay for strength, conformability, and wear resistance
• Standard (STD) crankshaft undersize — designed for use with a stock, unground crankshaft

Suitable for street performance, motorsports, and heavy-duty rebuilds where durability and precise tolerances are critical. The P-Series is one of the most versatile and widely trusted bearing lines for OE-replacement and performance engine assembly.