ACL Bearings 8B634H-010 Race Series Connecting Rod Bearing Set .010 Oversize Ford Small Block

The ACL Bearings 8B634H-010 is a high-performance Race Series connecting rod bearing set designed specifically for Ford Small Block 221, 255, 260, 289, and 302 ci Windsor V8 engines. This .010" oversize bearing set features tri-metal construction with lead, tin, copper, and nickel for superior strength and seizure resistance.

Key Features:

• High strength overlay plate with reduced thickness for improved fatigue properties
• Hardened steel backs on all rod bearings to improve the support of the bearing lining and assist with bearing retention in the housing
• Increased crush for improved bearing retention
• Elimination of flash plating on the back of the bearings to improve heat transfer and maximize grip between bearings and housing
• Increased eccentricity to compensate for bore distortion at high RPM and assist in the formation of hydrodynamic oil films
• Enlarged ID chamfers on bearing edges to accommodate large fillet radius on performance crankshafts
• Manufactured to exacting tolerances with particular attention to wall thickness accuracy for reliable fit and consistent clearances

ACL Race Series bearings are engineered for extreme endurance under harsh conditions, including high RPM and high boost applications where fatigue, stress wear, and failure resistance are critical. Technical specifications: Maximum overall length 18.44mm, maximum shaft size 53.939mm, maximum tunnel size 56.891mm, wall thickness at crown 1.46mm.

This bearing set is identified by the "H" suffix denoting ACL's Race Series line and is supplied as a complete kit for one engine. The .010" oversize is designed for use with reground crankshafts that have been undersized by .010 inch.