Race Series Engine Bearings

The ACL Race Series rod bearing set represents a premier choice for motorsports, recognized for its use in record-setting and championship-winning engines across various racing disciplines. The construction utilizes tri-metal with hardened steel backs, providing superior support for the bearing lining and ensuring secure retention within the housing. Key benefits include a high-strength overlay plate with optimized thickness for improved fatigue resistance, increased crush for better retention, and the elimination of back-side flash plating to maximize heat transfer and grip. The bearings also incorporate increased eccentricity to manage bore distortion at high RPM and aid in hydrodynamic oil film formation. Specifications for this standard size set include availability in STD, .025, and .25 sizes, with standard oil clearance. The half type is identical halves. Detailed measurements include minimum and maximum standard shaft sizes, minimum and maximum standard tunnel sizes, maximum wall at the crown, and maximum overall length, all manufactured to tight, consistent wall tolerances for precise clearance maintenance. They are suitable for the 2009-2021 Nissan GTR and the 1989-2002 Nissan Skyline models.