ACL Bearings 1B818H-STD Race Series H Trimetal Connecting Rod Bearing Standard Size

The ACL Bearings 1B818H-STD is a single Race Series H-series high-performance trimetal connecting rod bearing in standard size. ACL Race Series bearings are engineered for demanding applications, combining advanced metallurgy, precision manufacturing, and performance-focused design to deliver superior durability and reliability over stock replacement bearings.

ACL's Race Series trimetal construction features a hardened steel backing, a strong intermediate layer, and a precision overlay designed to handle elevated RPM, high cylinder pressures, and demanding operating conditions. This individual bearing half is ideal for selective replacement or custom engine builds requiring precise bearing selection.

Key Features:

• Trimetal construction — high-strength overlay plate with reduced thickness for improved fatigue resistance
• Hardened steel backs on rod bearings to improve support of the bearing lining and assist with retention in the housing
• Increased crush for improved bearing retention in the rod bore
• No flash plating on the back — improves heat transfer and maximizes grip between the bearing and housing
• Increased eccentricity to compensate for bore distortion at high RPM and assist in the formation of hydrodynamic oil films
• Tight, consistent wall tolerances to help maintain accurate and repeatable oil clearances
• Enlarged ID chamfers on bearing edges where required to accommodate large fillet radii on performance crankshafts
• Standard size (STD) — fits standard, unground crankshaft journal dimensions

ACL is a trusted OEM and aftermarket supplier with a long history in professional motorsports, from drag racing to road racing. The Race Series line is a go-to choice for engine builders who demand consistency and performance in high-output builds.