Description
A worn or damaged main bearing set directly compromises engine reliability and power delivery—especially critical if you’re running boosted power or high RPM applications. This Speed Pro kit delivers OEM-quality bearing surfaces with precise tolerances, ensuring proper crankshaft support and oil film integrity under sustained load. Upgrading to fresh main bearings is one of the most cost-effective ways to guarantee long-term engine stability during a rebuild or performance refresh.
Technical Specifications:
- Manufacturer: Speed Pro
- MPN: 139M10
- Undersize: 0.010 in
- Application: Small Block Chevy
- Kit Type: Complete set
- Material: Precision lined
- Fitment: Engine-specific
- Installation: Professional recommended
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