ACL 6B1584H-STD Standard Rod Bearing Set for BMW N54 / N55 / S55 (2007-2016)

Vehicle Fitment

• BMW 1 Series M (N54) - 2011
• BMW 135i (N54 / N55) - 2008-2010
• BMW 335i (N54 / N55) - 2007-2010
• BMW 335i xDrive (N54 / N55) - 2009-2010
• BMW 335is (N54 / N55) - 2011-2013
• BMW 335xi (N54 / N55) - 2007-2008
• BMW 535i (N55) - 2008-2010
• BMW 535i xDrive (N55) - 2009-2010
• BMW 535xi (N55) - 2008
• BMW 740i / 740Li (N55) - 2011-2012
• BMW X6 xDrive35i (N55) - 2008-2010
• BMW Z4 sDrive35i / sDrive35is (N54 / N55 / S55) - up to ~2016

Features

• Race-series tri-metal construction for strength and fatigue life
• Standard-size (STD) design for OEM-spec crankshafts
• Hardened steel backing for enhanced support and retention
• No flash plating on the back - better heat transfer to the engine block
• Increased eccentricity for stable oil-film at high RPM
• Raised crush height ensures secure bearing seating
• Tight and consistent wall tolerances for reliable clearances
• Identical upper and lower bearing shells for easier installation

Specifications

• Part Number: 6B1584H-STD
• Bearing Size: Standard (STD)
• Oil Clearance: Standard / Race spec
• Half Shell Type: Identical upper / lower
• Material: Tri-metal (steel backing, copper-lead, lead/tin overlay)
• Suitable for: 3.0L Inline-6 BMW N54, N55, S55 engines

Included Components

• 6x rod bearing shells (complete set for one inline-6 engine)

Product Description

The ACL 6B1584H-STD is a high-performance Race Series rod bearing set engineered for BMW's 3.0 L inline-6 engines - specifically the N54, N55, and S55 platforms. Designed to match OEM journal sizes, this set is ideal for both rebuilds and high-stress applications.

These bearings feature a tri-metal construction and hardened steel backing to ensure superior fatigue resistance and bearing retention. The increased eccentricity supports a solid hydrodynamic oil film, even under aggressive driving conditions, while the raised crush height helps maintain accurate bearing placement.

Whether you're assembling a performance street motor, preparing a track build, or doing a preventative replacement, the 6B1584H-STD offers reliable clearances, strong load capacity, and long-term durability for your BMW N54, N55, or S55 engine.