ACL Race Series 0.25mm oversized rod bearing set full view
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ACL Nissan DETT VQ35HR DOHC 4V TT 0.25mm Oversized High Performance Rod Bearing Set

ACL
ACL6B2639H-.25
Bearings
1 Units In Stock - Ships Next Business Day
ACL, Bearings, Engine, Engine Block
$ 190.01
$ 190.01

SKU: 6B2639H-.25

ACL Race Series Rod Bearing Set 0.25mm Oversized Nissan VQ35HR / VQ37VHR (Infiniti G35/G37/Q50/Q60 & Nissan 350Z/370Z)

The ACL 6B2639H-.25 Race Series Rod Bearing Set (0.25mm Oversized) is the best high-performance bearing upgrade for Nissan VQ35HR and VQ37VHR engines found in Infiniti G35/G37/Q50/Q60, Nissan 350Z/370Z, and other models. Engineered for high-RPM, boosted, or race applications, these bearings feature tri-metal construction, high-strength overlay, and precision sizing for maximum load capacity, reduced friction, and superior oil clearance – ideal for naturally aspirated, turbo, or supercharged builds pushing the limits of the VQ engine family.

Key Features

  • 0.25mm Oversized: Provides precise clearance for performance builds or engines requiring additional oil film thickness
  • Tri-Metal Construction: Steel back, copper-lead intermediate layer, and high-strength overlay for extreme load and RPM capability
  • High-Performance Design: Optimized for race and boosted applications with superior fatigue resistance and embeddability
  • Precision Tolerance: Tight tolerances ensure consistent oil clearance and minimal wear under high stress
  • Race Series: ACL's premium line trusted in motorsport for reliability under demanding conditions
  • Complete Set: Includes all 12 rod bearings (6 pairs) for full engine rebuild or upgrade

Specifications

Specification Detail
Part Number 6B2639H-.25
Bearing Type Race Series Rod Bearings (0.25mm Oversized)
Material Tri-Metal (Steel Back, Copper-Lead, High-Strength Overlay)
Engine Nissan VQ35HR / VQ37VHR (Infiniti & Nissan V6)
Compatibility Infiniti G35/G37/Q50/Q60, Nissan 350Z/370Z, FX35/FX37, EX35/EX37, M35/M37, QX50/QX70
Oversize 0.25mm
Quantity Set of 12 (6 pairs)
Installation Requires Engine Disassembly & Proper Clearance Check
Country of Origin Australia
Warranty Limited (ACL)

Product Notes

  • 0.25mm oversized requires crankshaft machining or matching rods for proper clearance
  • Race Series designed for high-RPM, boosted, or track applications; check clearances with plastigage
  • Compatible with many VQ35HR/VQ37VHR engines verify exact application and oversize needs

Installation Notes

  • Estimated time: 8-16 hours (full engine build), advanced difficulty, professional installation required
  • Requires engine disassembly, crankshaft inspection, and precise clearance measurement use assembly lube
  • Full valvetrain and bearing inspection advised professional machine shop recommended

This Part Fits

Year Make Model Notes
2007-2008 Infiniti G35 VQ35HR (Base, Journey, Sport, X)
2008-2013 Infiniti G37 VQ37VHR (Base, IPL, Journey, Sport, X)
2014-2024 Infiniti Q50 VQ37VHR (Base, Red Sport 400, Hybrid, etc.)
2014-2022 Infiniti Q60 VQ37VHR (Luxe, Red Sport 400, etc.)
2007-2009 Nissan 350Z VQ35HR (Base, Enthusiast, Touring, Grand Touring, Nismo)
2009-2020 Nissan 370Z VQ37VHR (Base, Nismo, Sport, Touring, etc.)
Various Infiniti EX35/EX37, FX35/FX37, M35/M37, QX50/QX70 VQ35HR/VQ37VHR Engines

Why Choose ACL Race Series Rod Bearings?

  • 0.25mm oversized and tri-metal design provide superior load capacity and oil clearance for high-performance builds
  • Optimized for boosted or high-RPM VQ engines excellent fatigue resistance and embeddability
  • Trusted in motorsport perfect upgrade for G37, Q50, 370Z, and other VQ35HR/VQ37VHR applications

Frequently Asked Questions

  • Q: Will these bearings fit my 2015 Infiniti Q50 Red Sport?
    A: Yes, ACL 6B2639H-.25 fits VQ37VHR engines in Q50/Q60, 370Z, G37, etc. (0.25mm oversized).
  • Q: Do I need crankshaft machining?
    A: Yes, 0.25mm oversized requires undersized crankshaft journals or matching rods.
  • Q: Is professional installation required?
    A: Yes, requires engine disassembly, precise clearance checks, and professional assembly.
  • Q: Are these for high-horsepower builds?
    A: Yes, Race Series designed for boosted, high-RPM, or track applications.

Shipping & Handling

  • Method: UPS/FedEx Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Secure retail box
  • Weight: 0.6 lbs

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