ACL Bearings Toyota 4 1994cc 5R 1967-86 0.25

The ACL 4B2980-.25 is a set of oversized rod bearings designed for high-performance applications. These bearings feature a high-strength overlay plate with improved fatigue properties and hardened steel backs for solid support. They also include increased crush for enhanced retention and eliminated flash plating on the back to improve heat transfer.

The design accounts for bore distortion with increased eccentricity to form hydrodynamic oil films, and the 3/4 grooved main bearings optimize oil flow. The bearings have tight wall tolerances for maintaining clearances and enlarged ID chamfers for compatibility with performance crankshafts. They are built to withstand abrasion, load, impact, and heat, making them suitable for serious engine performance.