ACL Performance Main Bearing Set - BMW N54B30 / N55B30 / S55B30

ACL Performance Main Bearing Set - BMW N54B30 / N55B30 / S55B30

- High performance trimetal engine bearings

- Designed to withstand higher RPM conditions

- High strength overlay plate with reduced thickness for improved fatigue properties

- Made in Australia

- ACL Performance part no. 7M1397H-STD / 7M1397H-.25

Compatible with BMW N54B30 / N55B30 / S55B30 engines.

For full compatibility please refer to the ACL Performance application chart.

The ACL Race Series Rod Bearings are designed for high-performance and racing engines, offering exceptional strength, durability, and reliability under high RPM and extreme operating conditions. Their high-strength tri-metal construction, reduced-thickness overlay, and hardened steel backing provide outstanding fatigue resistance and bearing retention, making them ideal for both naturally aspirated and forced induction applications.

Engineered for precision, ACL Race Series bearings feature optimized oil film control, increased bearing crush, and tight manufacturing tolerances to ensure consistent clearances and reliable lubrication. Enlarged chamfers on selected applications also provide compatibility with performance crankshafts, making these bearings a trusted choice for demanding street, track, and motorsport engine builds.

ACL Performance Engineering Bulletin

For more information visit https://aclperformance.com.au/