Victor MS1039P30 P-Series Tri-Metal Crankshaft Main Bearing Set .030" Undersize

The Victor MS1039P30 is a P-Series tri-metal crankshaft main bearing set designed for Ford 429 and 460 big block V8 engines. This set is manufactured to .030-inch undersize specifications, making it the correct choice for engine rebuilds where the crankshaft journals have been machined 30 thousandths below stock diameter.

Key Features:

• Tri-Metal Construction: Features a steel back for structural support, a cast copper-lead lining to withstand the demands of engine operation, and an electroplated babbitt overlay on the running surface for superior bearing qualities
• .030" Undersize: Engineered for use with crankshafts that have been reground 0.030 inches undersize; maximum wall thickness of 0.1108 inch
• 1/2 Groove Design: Half-groove oil channel configuration optimized for proper lubrication distribution across the bearing surface
• P-Series Performance: Intended for high-revving engines with higher eccentricity and a high crush factor to compensate for high load factors and distortion
• Superior Conformability: Delivers conformability, embedability, slipperiness, and fatigue resistance beyond what standard OEM and bimetal bearings provide
• Bore Range: Minimum bore 3.1922 inches, maximum bore 3.1930 inches

The P-Series tri-metal design incorporates a copper-lead alloy layer bonded to a precision steel back, finished with a precision electroplated white metal babbitt surface layer — ideal for OE replacement and performance rebuilds alike. Cross-references Clevite part number MS-1039P-30.