ACL Performance Rod Bearing Set

2020 Toyota GR Supra 3.0L Inline 6 (BMW B58B30, S58B30)

6B1510H-.025

Overview:

The ACL Performance Rod Bearing Set is engineered specifically for the 2020 Toyota GR Supra equipped with the BMW B58B30 and S58B30 3.0L inline 6-cylinder engines. Designed to meet the rigorous demands of high-performance and racing applications, this connecting rod bearing set ensures reliable durability and optimal engine efficiency. Ideal for enthusiasts and professional tuners alike, these bearings provide a precise .025mm (0.001") undersize fit, accommodating engine rebuilds and modifications with exacting tolerances.

Whether you are upgrading your Supra for track use or restoring engine integrity after wear, ACL’s rod bearings deliver consistent performance and protection under extreme conditions. Their high-quality construction helps reduce friction and wear, contributing to longer engine life and improved power delivery.

Key Features:

ACL rod bearings are crafted with advanced materials and precision engineering to support demanding performance environments. Key features include:

• Precision .025mm (0.001") undersize dimensions for accurate fitment during engine rebuilds
• Designed specifically for BMW B58B30 and S58B30 3.0L inline 6 engines found in the 2020 Toyota GR Supra
• High-quality tri-metal construction for superior wear resistance and load capacity
• Optimized surface finish to reduce friction and improve oil film retention
• Enhanced durability to withstand high RPM and increased power output
• Manufactured to meet or exceed OEM specifications for reliable performance
• Ideal for both street performance and motorsport applications

Construction & Design:

ACL rod bearings utilize a tri-metal design, combining a steel backing with layers of copper-lead and a soft overlay to provide excellent conformability and embedability. This construction ensures the bearings can accommodate minor debris and surface imperfections while maintaining a robust oil film to prevent metal-to-metal contact. The precise undersize dimension of .025mm (0.001") allows for proper clearance in rebuilt or modified engines, ensuring optimal lubrication and minimizing wear.

Each bearing is manufactured with tight tolerances and undergoes rigorous quality control to guarantee consistent thickness and surface finish. This attention to detail supports smooth crankshaft rotation and reduces the risk of premature bearing failure, even under high-stress conditions.

Installation & Fitment:

The ACL Performance Rod Bearing Set is designed for direct fitment in the 2020 Toyota GR Supra with the BMW B58B30 and S58B30 3.0L inline 6 engines. Installation should be performed by a qualified technician or experienced engine builder to ensure proper bearing clearance and torque specifications are met. The .025mm undersize bearings are intended for use when the crankshaft journals have been machined to this dimension, so verification of journal size is essential before installation.

No modifications to the engine block or rods are required when using these bearings, making them a straightforward upgrade or replacement option during engine rebuilds or performance enhancements.

What’s Included

• Complete set of connecting rod bearings sized at .025mm (0.001") undersize
• Packaging and installation instructions

Ideal For:

This rod bearing set is ideal for Toyota GR Supra owners and engine builders who are performing a rebuild or upgrade on the 3.0L inline 6 engine, particularly those utilizing the BMW B58B30 or S58B30 powerplants. It suits enthusiasts seeking enhanced durability and reliability for street, track, or motorsport use. Additionally, it is well-suited for tuners increasing engine output who require bearings capable of handling higher loads and RPMs without compromising engine longevity.

ACL Race Series is known for performance engine bearings used across motorsports, with rod and main bearing options engineered for durability under high load and heat. Their positioning centers on racing-focused design, metallurgy, and engineering intended to stand up to demanding competition engines.