Speed Pro 107M Engine Crankshaft Main Bearing Set

Speed Pro 107M Main Bearing Set for Buick V6

Speed Pro 107M is a standard-size engine crankshaft main bearing set for Buick 231 Even Fire V6 applications. Built for Competition Series use, it combines a steel-backed overplated bronze alloy construction with a half-grooved, 3/4 groove design for controlled oiling in performance engine builds.

Compatible With select Buick, Oldsmobile, Pontiac, Chevrolet, and Cadillac V6-powered vehicles from 1977-1993, including Buick LeSabre, Buick Regal, Buick Riviera, Oldsmobile Cutlass Supreme, Pontiac Grand Prix, and Chevrolet Monte Carlo applications.

Key Features

• Part number 107M
• Engine crankshaft main bearing set
• Standard size: Std-1-10
• Competition Series application
• Half grooved / 3/4 groove design
• Super Duty Alloy construction
• Steel backed overplated bronze alloy bearing material
• Built for Buick 231 Even Fire V6 engines

Detailed Description

Speed Pro 107M is engineered for Buick V6 engine builds that need a standard-size main bearing set with performance-oriented oil control. The half-grooved and 3/4 groove design supports crankshaft lubrication strategy in high-performance street and track applications, while the steel-backed overplated bronze alloy construction provides the bearing structure expected in demanding engine assemblies. This part number 107M is a direct-fit choice for many 1977-1993 Buick, Oldsmobile, Pontiac, Chevrolet, and Cadillac models equipped with the 231 Even Fire V6.

This part cross-references Monroe Shocks & Struts (e.g., 3607234, MS960V) for the same application.

Common Uses

• Replacing worn crankshaft main bearings during a Buick V6 rebuild
• Restoring oil clearance and bearing surface integrity in high-performance engines
• Addressing bearing wear, scoring, or fatigue in 231 Even Fire V6 assemblies
• Supporting engine refresh work for Buick LeSabre, Buick Regal, and Buick Riviera builds
• Serving performance-oriented rebuilds for Oldsmobile Cutlass Supreme and Pontiac Grand Prix applications

Installation Notes and Tips

• Verify crankshaft journal condition and measure oil clearance before final assembly.
• Confirm standard-size bearing requirements; do not assume undersize or oversize fitment.
• Clean all bearing saddles, oil passages, and mating surfaces before installation.
• Use proper assembly lubricant and follow factory torque specifications during engine build.
• Check fitment against the exact engine code and displacement before ordering.

Quality Assurance

Speed Pro positions this component as a value-focused performance engine part, backed by materials and design choices suited to competition and high-performance rebuilds. The 107M main bearing set is built for Buick 231 Even Fire V6 applications where standard-size fitment and controlled oiling are required.