What does it mean that these bearings are 0.025mm undersize?

This means the inner diameter of the bearings is slightly smaller than standard. They are intended for use with a crankshaft that has been machined down by 0.025mm. This allows for a precise fit on the journals after machining.

What is tri-metal construction?

Tri-metal bearings use three layers of different materials, typically steel, copper-lead alloy, and a softer overlay like babbitt. This construction offers a strong, durable base with excellent load-carrying capacity and conformability to the crankshaft.

Do these bearings come with new hardware?

This set includes the rod bearings themselves. It does not typically include new connecting rod bolts or nuts, which are often single-use and should be replaced separately according to manufacturer specifications.

ACL BMW B58 / Toyota Supra B58 0.025mm Oversized Tri-Metal Performance Rod Bearing Set

Specifications

Brand: ACL
Part #: 6B1510H-.025
UPC: 9315726456026

ACL BMW B58 / Toyota Supra B58 0.025mm Oversized Tri-Metal Performance Rod Bearing Set

Name: ACL BMW B58 / Toyota Supra B58 0.025mm Oversized Tri-Metal Performance Rod Bearing Set
Brand: ACL
Price: 183.63 USD
Availability: InStock

$183.63

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ACL BMW B58 / Toyota Supra B58 0.025mm Oversized Tri-Metal Performance Rod Bearing Set. Fits 2016-2018 BMW 340i. Essential for high-performance engine builds.

Key Features

Fits 2016-2018 BMW 340i, 2018-2019 BMW X3, and 2020 Toyota GR Supra.
Designed for BMW B58B30 and S58B30 engines.
Features a durable tri-metal construction for high-load performance.
Includes rod bearings that are 0.025mm undersize for use with machined crankshafts.
Helps reduce friction and wear between the crankshaft and connecting rod.

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Fits these vehicles

BMW 340i 2016-2018
BMW X3 2018-2019
Toyota GR Supra 2020

Product Details

Doing an engine rebuild on your 2016-2018 BMW 340i, 2018-2019 X3, or 2020 Toyota GR Supra? These ACL tri-metal performance rod bearings are a critical component for ensuring the longevity and reliability of your B58 or S58 engine, especially when you're pushing its limits. Rod bearings sit between the crankshaft and connecting rod, reducing friction and wear in a high-stress environment. When building or refreshing a performance engine, upgrading these bearings is a smart move.

ACL uses a tri-metal construction, which is well-known for its strength and ability to handle high loads and temperatures. This particular set is 0.025mm undersize, meaning it's designed to be used with a crankshaft that has been machined down by that amount. This allows for a fresh, precise fit on the crank journals, which is crucial for proper oil clearance and performance. The precise oil clearance helps ensure the bearings get the right amount of lubrication, keeping them cool and preventing premature wear.

When you're working on a performance engine build, getting the details right is key. These ACL bearings are a solid option for anyone looking to ensure their engine can handle the demands of increased power. Always refer to your engine's service manual for specific installation procedures and required oil clearances.