Are these bearings a direct replacement for stock?

Yes, these are standard size bearings designed to fit directly into the connecting rods of the specified BMW engines. They are intended for use with a crankshaft that is within factory specifications.

What makes these 'Race Series' bearings different from standard ones?

The Race Series bearings feature a stronger tri-metal overlay and tighter tolerances. This construction helps them withstand higher loads and temperatures often encountered in performance or track driving compared to standard bearings.

Do I need to measure my crankshaft before ordering?

If your crankshaft is still at factory specifications, standard size bearings like these will fit. However, if the crankshaft has been machined or reconditioned, you'll need to measure its journals to determine if you require standard, undersize, or oversize bearings.

Specifications

Brand: ACL
Part #: 4B1584H-STD
UPC: 4B1584H-STD

ACL BMW N20B20 / N26B20 2.0L Inline Race Series Standard Size Conrod Rod Bearing Set

Name: ACL BMW N20B20 / N26B20 2.0L Inline Race Series Standard Size Conrod Rod Bearing Set
Brand: ACL
SKU: acl-acl-bmw-n20b20-n26b20-2-0l-inline-race-series-standard-size-conrod-rod-beari-t14-541854
Price: 143.73 USD
Availability: InStock

$143.73

In Stock

2015-2020 BMW M4 ACL Race Series standard size rod bearings for N20B20/N26B20 2.0L engines. A solid option for performance builds.

Key Features

Fits 2015-2020 BMW M4, 2015-2018 BMW M3, and 2019-2021 BMW M2.
Designed for BMW N20B20 and N26B20 2.0L inline engines.
ACL Race Series conrod bearings are built for performance applications.
Features a tri-metal overlay for improved strength and load capacity.
Standard size bearings, intended for use with a factory-spec crankshaft.
Helps maintain proper oil clearance under high-stress conditions.

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About this part

Product Details

You get a full set of standard size rod bearings in this kit, which means one box handles the critical bottom-end component for your engine build. These ACL Race Series bearings are built for performance applications, offering a well-built option for your BMW M4, M3, or M2 with the N20B20 or N26B20 2.0L engine. When you're pushing your engine harder, especially in track or race conditions, the stock bearings might not hold up. These ACL bearings are designed with tighter tolerances and a stronger overlay to handle the increased stress.

ACL has been making engine bearings for a long time, and their Race Series is a popular choice for tuners and racers. They use a special tri-metal overlay that's known for its strength and ability to handle high loads and temperatures. This particular set is standard size, meaning it's meant to be used with a crankshaft that's still within factory specifications. If your crankshaft has been reconditioned or machined, you'll want to double-check the size needed, but for a fresh build or a stock crank, these are the ones to go with. They fit right into the connecting rods, ready to keep your engine running smoothly under pressure.