Description
Proper main bearings are fundamental to engine longevity and reliability—they handle extreme pressures and temperatures while keeping your crankshaft centered and rotating smoothly. ACL’s Main Bearing Set 5M909A-STD delivers OEM-quality construction with tight tolerances, ensuring consistent oil film strength and minimal wear over thousands of miles. Whether you’re rebuilding a street engine or preparing for sustained track use, this standard-grade bearing set provides the durability and precision your Small Block Chevy demands.
- Main bearing set
- A-Series engine
- Standard grade
- Small Block Chevy
- Complete kit
- ACL engineered
- Tight tolerances
- Oil film optimized






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