ACL Race Series main bearings are trimetal engine bearings for high-RPM conditions, featuring a high-strength overlay plate and tight, consistent wall tolerances.
Increased eccentricity helps compensate for bore distortion and supports the formation of hydrodynamic oil films. The design improves bearing retention in the housing and optimizes oil flow.
- Trimetal construction with a high-strength overlay plate of reduced thickness
- Increased eccentricity for hydrodynamic oil film formation
- 3/4-grooved main bearings for optimized load-carrying surface area and oil flow
- Tight, consistent wall tolerances
- Enlarged ID chamfers for large fillet radii on performance crankshafts
- ACL Race Series main bearing set
Suitable for: Audi Q3 I (8U), Audi RS3 II (8P) / III (8V), Audi RSQ3 I (8U), Audi TT II (8J).
Engines: EA855 2.5 TFSI (CEPA, CZGB, CZGA, CTSA, CEPB). 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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