• ACL Race Series rod bearing set for BMW N54 N55 S55B30

Upgrade your rotating assembly with ACL Race Series tri-metal connecting rod bearings, engineered for high-RPM performance and forced-induction reliability. Features hardened steel backs for improved bearing retention, increased crush for better retention, reduced-thickness high-strength overlay plate for improved fatigue properties, and elimination of flash plating for better heat transfer.

Fits: BMW N54B30, N55B30, S55B30 (3.0L Inline-6)

  • Standard — stock, unworn rod journals
  • Standard HX — same size as standard, +0.001" extra clearance, for built engines running higher oil temps/RPM
  • 0.025mm Undersize — fine trim, minor rod journal cleanup
  • 0.25mm Undersize — first regrind step

⚠️ Before ordering an undersize set, confirm your connecting rods have been machined to the matching undersize spec — check clearances with Plastigauge before final assembly.

ACL

ACL Race Series Rod Bearing Set - BMW N54/N55/S55B30

SKU 6B1584H-STD
$170.00

Upgrade your rotating assembly with ACL Race Series tri-metal connecting rod bearings, engineered for high-RPM performance and forced-induction reliability. Features hardened steel backs for improved bearing retention, increased crush for better retention, reduced-thickness high-strength overlay plate for improved fatigue properties, and elimination of flash plating for better heat transfer.

Fits: BMW N54B30, N55B30, S55B30 (3.0L Inline-6)

  • Standard — stock, unworn rod journals
  • Standard HX — same size as standard, +0.001" extra clearance, for built engines running higher oil temps/RPM
  • 0.025mm Undersize — fine trim, minor rod journal cleanup
  • 0.25mm Undersize — first regrind step

⚠️ Before ordering an undersize set, confirm your connecting rods have been machined to the matching undersize spec — check clearances with Plastigauge before final assembly.
$170.00
Size:
Before Ordering

European engine components can vary by engine code, production date and component size. Confirm the application before installation.

  • Verify the engine code and vehicle application.
  • Match the manufacturer part number / SKU shown for the selected item.
  • Confirm STD, undersize or oversize where applicable.
ManufacturerACL
Product TypeEngine Bearings
Need help confirming fitment? Ask us before ordering →
ACL Race Series rod bearing set for BMW N54 N55 S55B30

Confirm Fitment Before Installation

European engine components can vary by engine code, production date, chassis and size. Compare the part number and specifications with your application before installation. If you are unsure, contact us before ordering.

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