Robust Rebuild: Speed Pro 0.020" Undersize Main Bearings for SBC

When your Small Block Chevy crankshaft requires a more significant regrind, the Speed Pro 139M20 0.020" Undersize Main Bearing Set provides the essential components for a successful and durable engine rebuild. These bearings are precisely engineered to accommodate crankshafts that have been machined down by twenty thousandths of an inch, ensuring the critical oil clearance needed for optimal performance and extended engine life. Trust Speed Pro for the robust solutions your high-performance or heavily worn SBC demands.

Engineered for Demanding Applications

• 0.020" Undersize: Perfectly matched for crankshafts with a significant journal diameter reduction.
• Heavy-Duty Construction: Built with resilient materials to withstand extreme engine loads and temperatures.
• Enhanced Oil Film Stability: Promotes consistent lubrication, reducing friction and wear in critical areas.
• Complete Set: Provides all main bearings necessary for a comprehensive engine bottom-end overhaul.

The Smart Choice for SBC Rebuilds

Opting for the correct undersize main bearings is non-negotiable for the integrity of a rebuilt engine. Speed Pro's 139M20 set offers the reliability and precision that professional engine builders and serious enthusiasts depend on. These bearings are designed to restore the vital connection between your crankshaft and engine block, ensuring smooth rotation and preventing catastrophic failures. Invest in the proven quality of Speed Pro for your Small Block Chevy, and drive with confidence knowing your engine's foundation is solid.

Fitment:

• Small Block Chevy Engines (Crankshaft machined 0.020" undersize)