ACL Race Series BMW N54 N55 S55 Conrod Bearings – 6B1584H/STD

ACL Race Series conrod bearing set for compatible BMW N54, N55 and S55 3.0-litre engines. Part Number: 6B1584H/STD The ACL Race Series 6B1584H/STD bearing set is a performance replacement conrod bearing set for compatible BMW N54, N55 and S55 engines. This listing is for the standard-size bearing set. ACL Race Series Construction ACL Race Series bearings use performance-focused bearing construction including: Tri-metal bearing construction High-strength steel backing Increased bearing crush and retention Performance-oriented bearing geometry Correct crankshaft journal condition and bearing clearance should always be checked during installation. What Is Included? Complete ACL Race Series 6B1584H/STD conrod bearing set New connecting-rod bolts are not included with this standalone product. BMW S55 Applications Suitable S55 applications include: BMW F87 M2 Competition BMW F87 M2 CS BMW F80 M3 BMW F80 M3 Competition BMW F80 M3 CS BMW F82/F83 M4 BMW F82/F83 M4 Competition BMW F82 M4 CS BMW F82 M4 GTS Engine: BMW S55B30 The same bearing part number is also used for compatible BMW N54B30 and N55B30 applications. Why Do Rod Bearings Wear? Connecting-rod bearings are highly loaded internal engine components. During normal engine operation, the crankshaft journal is supported by a thin film of engine oil between the journal and bearing surface. Bearing condition can be affected by factors including: Mileage and engine hours Oil condition Oil contamination Engine operating temperature High engine load High-RPM or track use Crankshaft journal condition Bearing clearance General long-term wear S55 Installation at Swift Performance For BMW S55 customers, Swift Performance also offers these ACL Race Series bearings as part of our crank-hub workshop package. When carried out alongside our S55 crank hub installation, the ACL rod-bearing upgrade is: £500 including VAT This includes: ACL Race Series 6B1584H/STD bearings New OEM BMW connecting-rod bolts Installation Because our S55 crank-hub procedure already requires removal of the engine sump, carrying out the rod bearings at the same time avoids a significant amount of duplicated labour. View our BMW S55 Crank Hub & ACL Rod Bearing Package