ACL Race main bearings for Nissan RB20E / RB20S / RB20DE …

ACL Race main bearings are trimetal engine bearings designed for higher RPM conditions and demanding engine operation. Their construction combines a high-strength overlay plate with consistent wall tolerances.

Increased eccentricity assists hydrodynamic oil-film formation, while the 3/4 groove optimizes bearing load-carrying surface area and oil flow to the conrod bearings. The set includes ACL Race Series main bearings.

• Trimetal construction with a high-strength overlay plate of reduced thickness
• Increased crush for improved bearing retention in the housing
• Elimination of flash plating on the back for improved heat transfer and grip
• Increased eccentricity to compensate for bore distortion at high RPM
• 3/4 grooved main bearings to optimize load-carrying surface area and oil flow

Suitable for: Nissan Patrol II (Y60) / III (Y61), Nissan Skyline I (R32) / III (R33) / VII (R31).

Engines: RB20E, RB20S, RB20DE, RB20DET, RB30ET, RB30S, RD28T, RB25DET, RD28, RD28E, RB25DE, RB30E. Please check your vehicle’s engine code (registration document or VIN) before ordering; if in doubt, contact us and we will check for you.

Sizes

STD is the standard size for an unground crankshaft. Undersizes (−0.25 mm, −0.50 mm …) are for a reground crank, and “+0.025 mm clearance” (X) is for highly stressed engines. Your machine shop chooses the size after measuring.