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The ACL Race Series Main Bearing Set (STD) is engineered for Subaru EJ-series engines with thrust located in the #5 position. Suited for housings machined to +.005" oversize, this set provides superior reliability in high-performance and high-RPM conditions. With ACL’s proven trimetal construction, these bearings deliver excellent fatigue resistance, improved heat transfer, and consistent oil film stability—ideal for both street and motorsport builds.
Key Features
Standard (STD) size main bearing set
Designed for Subaru EJ-series engines with thrust in the #5 position
Suits housings +.005" oversize
Trimetal construction with strengthened overlay for enhanced fatigue resistance
Tight wall tolerances for consistent clearances
Optimized for high-RPM performance and high load durability
Enlarged ID chamfers to accommodate large crankshaft fillet radii
Technical Specifications
Sizes Available: STD, .025
Tunnel (housing) diameter: 64.127 – 64.147 mm
Shaft diameter: 59.984 – 60.000 mm
Max Wall Thickness: 2.069 mm
Max Length: 19 mm
Half Type: Identical halves
Note: Designed for engines with thrust in the #5 position, housings +.005" oversize
Weight: 0.33 kg
Fitment / Applications
This bearing set fits a wide range of Subaru EJ-series engines across various models, including:
Subaru Impreza / WRX / STI (GC, GD, GE, GF, GG, GR, GV, GJ, GP, VA) – EJ18, EJ20, EJ22, EJ25 engines including WRX, STI, and turbo variants
Subaru Legacy / Legacy Outback (BC, BD, BE, BG, BH, BL, BP, BM, BR) – EJ20, EJ22, EJ25 including turbo, twin-turbo, and STI models
Subaru Forester (SF, SG, SH) – EJ20, EJ22, EJ25 including turbocharged variants
Subaru Baja, Exiga, Saab 9-2X – EJ25 engines
