ACL Race Series main bearings are trimetal engine bearings designed for higher-RPM conditions. Their construction combines high strength, consistent wall tolerances and features that improve bearing retention in the housing.
The set includes main bearings with solutions for improved oil flow, heat transfer and the formation of hydrodynamic oil films.
- High-strength overlay plate with reduced thickness for improved fatigue properties
- Increased crush for improved bearing retention in the housing
- Elimination of flash plating on the back for improved heat transfer and grip in the housing
- Increased eccentricity to compensate for bore distortion at high RPM
- 3/4-grooved main bearings to optimize bearing load-carrying surface area and oil flow
Suitable for: Saab 9-2X I, Subaru Baja I (B12), Subaru Exiga I (YA5), Subaru Forester I (SF) / II (SG) / III (SH), Subaru Impreza I (GC/GF) / II (GD/GG) / III (GE/GV) / III (GH/GR) / III (STI/GRB), Subaru Legacy I (BC) / I (BF) / II (BD/BG) / III (BE/BH) / IV (BL/BP) / V (BM/BR), Subaru Outback II (ESTATE/BH) / III (BL/BP) / IV (BR), Subaru Wrx I (GJ/V1) / I (STI/VAB/VAF/VAG).
Engines: EJ20, EJ25, EJ22, EJ18 (EJ253, EJ255, EJ205, EJ20T, EJ25D, EJ251, EJ257, EJ20G, EJ22E, EJ20E, EJ20K, EJ207, EJ18E, EJ22G, EJ22T, EJ20D, EJ206, EJ208, EJ20Y, EJ252). 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.
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