ACL 6B2639H-.025 Race Rod Bearings for Nissan/Infiniti VQ35HR VQ37VHR VR30DDTT

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Product Specification:

SKU:ACL6B2639H-.025

MPN: 6B2639H-.025

Weight: 4.0 lb

Inventory: 2

Type: Bearings

Vehicle Fitment

2009-2020 Nissan 370Z (Z34, VQ37VHR)
2008-2013 Infiniti G37 Coupe/Sedan/Convertible (VQ37VHR)
2014-2016 Infiniti Q60 Coupe/Convertible (VQ37VHR)
2014+ Infiniti Q50 (VQ37VHR and VQ35HR Hybrid variants)
2014-2018 Infiniti Q70/M37 (VQ37VHR)
2013-2017 Infiniti QX50/EX37 and QX70/FX37 (VQ37VHR)
2017-2022 Infiniti Q60 (V37, VR30DDTT twin-turbo)
2016+ Infiniti Q50 Red Sport 400 (VR30DDTT twin-turbo)
2023+ Nissan Z (RZ34, VR30DDTT twin-turbo)

Fitment Notes

Fits Nissan/Infiniti VQ35HR, VQ37VHR, and VR30DDTT V6 engines only - confirm your specific engine code, as VQ35HR/VQ37VHR non-turbo and VR30DDTT twin-turbo variants were used across overlapping model years depending on trim and hybrid vs. non-hybrid configuration
.025 (0.025mm) undersize - for use with a crankshaft rod journal that has been machined .025mm (.001") under; verify actual journal size with your machine shop before ordering

Features

ACL Race Series Trimetal construction for high-performance and high-RPM engine builds
High-strength overlay plate with reduced thickness for improved fatigue resistance
Hardened steel backing to improve bearing lining support and retention in the rod
Increased crush for superior bearing retention under load
Flash plating eliminated from bearing backs for improved heat transfer
Increased eccentricity to compensate for bore distortion at high RPM
Optimized oil groove and distribution design for consistent lubrication
Identical-halves bearing design for simplified installation

Specifications

Position: Rod (big end/connecting rod) bearing set
Size: .025mm undersize
Bearing material: F781 alloy
Max shaft size: 53.974mm (2.1250 in)
Min shaft size: 53.962mm (2.1245 in)
Max overall length: 17mm (0.6693 in)
Vertical oil clearance range: 0.047mm-0.094mm (0.00185-0.00370 in)

Included Components

1x ACL Race Series Rod Bearing Set (full set for one engine)

Product Description

The ACL 6B2639H-.025 Race Series rod bearing set is engineered for Nissan and Infiniti VQ35HR, VQ37VHR, and VR30DDTT V6 engines that have had their rod journals machined .025mm undersize - a common step during a rebuild when journals need to be reground for wear or damage correction.

Built with ACL's Trimetal overlay and hardened steel backing, this set is designed to handle the higher loads seen in performance-built or heavily driven VQ/VR platform engines, whether in a naturally aspirated 370Z/G37 build or a VR30DDTT twin-turbo Q50/Q60/Nissan Z application.

As with any undersize bearing, confirm your actual machined journal diameter against ACL's spec before ordering, and always plastigauge or measure final clearance during assembly rather than relying on nominal sizing alone.