ACL Bearings 5M1959HC-.025 Race Series Main Bearing Set for Honda B-Series Engines

Upgrade the bottom-end reliability of your Honda or Acura B-Series engine with the ACL Bearings 5M1959HC-.025 Race Series Main Bearing Set. Designed for performance-oriented engine builds, this coated main bearing set features a 0.025 mm undersize specification for crankshafts machined to the corresponding undersize dimension. The bearings are engineered to support consistent crankshaft operation and dependable oil control in demanding street, track, and competition applications.
The ACL Bearings Race Series main bearings are manufactured for Honda B-Series applications, including select 1.6L through 2.4L engine configurations. Their coated construction provides an additional layer of protection for the bearing surface, helping promote durability during high-load and high-RPM operation when paired with proper crankshaft preparation, clearances, lubrication, and installation procedures. Always verify engine code, crankshaft journal measurements, and manufacturer specifications before installation.
This kit is supplied as a complete main bearing set and is identified by ACL Bearings part number 5M1959HC-.025. It is intended for professional engine assembly or experienced builders who require accurately matched components for a rebuilt or performance engine. The 0.025 mm undersize designation applies to the crankshaft journal sizing, not the engine block, so confirm all machining and bearing-clearance requirements before final assembly. The product is not air restricted and does not require truck freight.

Features:

• Brand: ACL Bearings

• Part Number: 5M1959HC-.025

• Application: Honda and Acura B-Series engines

• Engine Coverage: Select 1.6L through 2.4L applications

• Bearing Type: Race Series main bearing set

• Sizing: 0.025 mm undersize for properly machined crankshafts

• Construction: Coated bearing surface for enhanced durability

• Kit Contents: Complete main bearing set

• Use: Suitable for performance street, track, and competition engine builds

• Shipping Classification: Not air restricted and not truck freight only