BMW N52 and N53 connecting rod bearing set.
The unique combination of design, metallurgy, and engineering comes together to deliver what drivers expect from high-performance Trimetal engine bearings.
Designed to withstand higher RPMs, ACL Race Series engine bearings are available for many popular 4-, 6-, and 8-cylinder applications and feature:
A high-strength overlay with reduced thickness for improved fatigue properties.
Hardened steel backs on all connecting rod bearings to improve support for the bearing shell and help secure the bearing in the housing.
Increased clamping force (crush) for better bearing retention.
Elimination of flash plating on the rear side of the bearings to improve heat transfer through the bearing and maximize the grip between the bearing and the housing.
Increased eccentricity to compensate for bore deformation at high RPMs and contribute to the formation of a hydrodynamic oil film.
Main bearings with a 3/4 groove to optimize the load-bearing surface of the bearing and the oil supply to the connecting rod bearings.
Tight and consistent wall tolerances to help you maintain consistent bearing clearance.
Enlarged chamfers on the inner edges of the bearing flanges where necessary, to accommodate a larger fillet radius on performance crankshafts.
Technical Specifications
Sizes | STD, .025, .25, .50 (upon request) |
Tunnel [mm] | 53.600 / 53.616 |
Shaft [mm] | 49.973 / 49.993 |
Max. Wall | 1,793 |
Max. Length | 17.55 |
Half Type | Identical halves |
Weight | 0.70 |
