ACL Bearings 4B2904H Race Series Connecting Rod Bearings

ACL Race Series performance engine bearings are manufactured to exacting tolerances, designed specifically for high-performance and racing applications. The 4B2904H connecting rod bearing set is engineered for Lancia Delta Integrale 2.0L 8V and 16V engines, as well as Fiat Coupe 2.0 16V Turbo applications.

Key Features:

• Tri-metal construction with high-strength overlay for improved fatigue resistance
• Hardened steel backing for superior bearing retention in the housing
• Excellent seizure resistance under extreme conditions
• Increased eccentricity to compensate for bore distortion at high rpm
• Elimination of flash plating on the back of the bearings to improve heat transfer
• Increased crush for improved bearing retention
• Available in standard size with oversize options (.025", .25")

Standard shaft size: 50.787 / 50.807mm, Standard tunnel size: 53.897 / 53.913mm, Maximum wall at crown: 0.888mm, Maximum overall length: 19.50mm. These bearings feature a halve design with identical halves for ease of installation. The Race Series range delivers consistent clearances, excellent load capacity and stable oil film control at high RPM and cylinder pressures, making them ideal for street performance, drag racing, and circuit applications.