ACL Bearings 5M590HC-001 Race Series Main Bearing Set, 0.001 in Undersize, Coated, Small Block Ford

The ACL Bearings 5M590HC-001 Race Series Main Bearing Set is designed for Small Block Ford 255, 289, and 302 engines requiring dependable crankshaft support and consistent bearing performance. This coated main bearing set features a 0.001-inch undersize configuration for applications using a properly machined crankshaft journal. It is well suited for performance engine builds, rebuilds, and demanding street or racing applications where accurate fit and durable materials are essential.

ACL Bearings Race Series main bearings are engineered to provide reliable load support, effective oil control, and stable operation under elevated engine speeds and operating conditions. The coated bearing surface helps support durability and protection between the bearing and crankshaft when installed with the correct clearances, lubrication, and machining specifications. Each set is produced for compatible Small Block Ford applications, helping simplify component selection during engine assembly.

Before installation, verify crankshaft journal sizing, housing bore condition, bearing clearance, thrust location, and engine compatibility. The 0.001-inch undersize specification is intended for use with the corresponding machined journal size and should not be installed without confirming measurements against the engine manufacturer’s requirements. Proper cleaning, lubrication, torque procedures, and alignment are essential for achieving the expected service life and performance of the ACL Bearings 5M590HC-001 main bearing set.

Features:

• Brand: ACL Bearings

• Part Number: 5M590HC-001

• Bearing Type: Main bearing set

• Series: Race Series

• Undersize: 0.001 inch

• Finish: Coated

• Engine Compatibility: Small Block Ford 255, 289, and 302 engines

• Application: Performance engine builds, rebuilds, and racing applications

• Installation Requirement: Verify crankshaft journal measurements and bearing clearances before installation