ACL Bearings 1B634H-01 Race Series Rod Bearing Set .001" Extra Clearance

The ACL 1B634H-01 Race Series connecting rod bearing set represents the unique combination of design, metallurgy, and engineering that delivers what high-performance drivers expect from premium tri-metal engine bearings. This -01 designation provides .001 inch extra clearance compared to standard bearings, making it ideal for precision engine builds where specific oil clearance is critical.

Race-Proven Construction:

• High-strength overlay plate with reduced thickness enhances fatigue resistance for longevity under extreme conditions
• Hardened steel backs improve support of the bearing lining and assist with bearing retention in the housing
• Elimination of flash plating on the back of bearings improves heat transfer and maximizes grip between bearings and housing
• Increased eccentricity compensates for bore distortion at high RPM and assists in formation of hydrodynamic oil films
• Enlarged ID chamfers on bearing edges accommodate large fillet radii on performance crankshafts
• Tight consistent wall tolerances help maintain precise clearances

ACL Race Series performance bearings are engineered for extreme endurance under harsh conditions, with top-tier metallurgy that eliminates concerns about fatigue and stress wear when running high RPMs. ACL is an engine builder's top choice for quality and consistency, and you'll find ACL bearings in many vehicles as they are an Original Equipment supplier.

These bearings are manufactured using ACL's proprietary heat-treated steel alloy, providing superior strength and wear resistance. The precision-machined surface with fine finish ensures optimal oil film development and bearing performance in demanding racing applications.