ACL main bearings BMW M20/M50/M52/M54/S50/S52/S54 STD

ACL Race main bearings for BMW M20, M50, M52, M54, S50, S52 and S54 inline-six engines with standard crankshaft. ACL Race Series is developed for tuning, performance and motorsport, where the main bearings are exposed to higher loads, higher RPM and greater demands on load capacity and reliability than standard bearings.

ACL Race Series main bearings are made as trimetal bearings with steel backing, copper/lead alloy and a durable overlay coating. The material choice, heat transfer and oil distribution are developed to ensure a stable oil film and high load capacity at high RPM and demanding operating conditions.

7M1532H-STD is the STD version, which means the bearings fit a standard crankshaft with standard bearing dimensions. The set is an extended groove main bearing set for BMW 6-cylinder inline engines with thrust bearing in position 6 and is often used for engine rebuilds, performance builds and motorsport engines.

Note:
For BMW M20, this set normally applies to engines with main bearings with two locating tabs. For early BMW M20 engines up to 03/1988, 7M1539H-STD is used instead.

Specifications:
Type: ACL Race main bearings H-STD
Material: Trimetal copper/lead alloy (F780) with steel backing and overlay
Crankshaft: Standard size (STD)
Bearing design: Extended groove main bearing set
Axial/thrust: Position 6
Contents: 14 bearing halves (7 complete main bearings)
ACL part number: 7M1532H-STD

Maximum overall length: 20.00 millimetres
Maximum overall length thrust bearing: 24.94 millimetres
Maximum shaft size: 59.990 millimetres
Maximum tunnel size: 65.019 millimetres
Maximum wall at crown: 2.490 millimetres
Minimum shaft size: 59.971 millimetres
Minimum tunnel size: 65.000 millimetres

Fits engine code:
M20B20 / M20B23 / M20B25 / M20B27 / M50B20 / M50B25 / M52B20 / M52B25 / M52B28 / M52TUB20 / M52TUB25 / M52TUB28 / M54B22 / M54B25 / M54B30 / S50B30 / S50B32 / S52B32 / S54B32