ACL 4M2633H-.025 Race Series Main Bearings for 1995-2001 Nissan VQ30/35 V6

Vehicle Fitment

• 1995-2001 Nissan Maxima (VQ30DE / VQ30DET / VQ35DE)
• 1996-2001 Infiniti I30 (VQ30DE / VQ30DET)
• 2003-2006 Nissan 350Z (VQ35DE)
• 2003+ Infiniti G35 (VQ35DE)
• 2002+ Infiniti FX35 (VQ35DE)

Features

• Race Series tri-metal main bearing set
• +0.025 mm oversize for performance crankshafts
• High-strength overlay for enhanced fatigue resistance
• Hardened steel backing for improved shell stability
• Increased crush tolerance for better retention
• 3/4 oil groove design to maximize load capacity
• Precise wall tolerances to ensure consistent clearances
• Optimized chamfers for large crank fillet radii

Specifications

• Part Number: 4M2633H-.025
• Size: +0.025 mm oversize
• Material: F780 tri-metal alloy
• Max Shaft (Journal) Size: ~59.975 mm
• Min Shaft Size: ~59.951 mm
• Max Tunnel Size: ~64.017 mm
• Min Tunnel Size: ~63.993 mm
• Max Overall Shell Length: ~20.12 mm
• Half-Type: Upper & Lower shells included

Included Components

• 1x Complete main bearing set (upper + lower shells)

Product Description

The **ACL 4M2633H-.025** is a high-performance, Race Series main bearing set designed for VQ-series V6 engines (2.5L, 3.0L, 3.5L) commonly found in Nissan and Infiniti vehicles. With a +0.025 mm oversize tolerance, it accommodates crankshafts that have been machined for performance or rebuilds.

Constructed with a tri-metal F780 alloy and reinforced with hardened steel backing, these bearings deliver excellent fatigue resistance and shell stability - even under high RPM or racing conditions. The 3/4 oil groove design ensures adequate oil flow and load support, while carefully engineered chamfers allow for clearance around larger crank fillet radii.

This bearing set is compatible with a variety of VQ-series engines: VQ30DE / VQ30DET (3.0 L) and VQ35DE (3.5 L), making them suitable for cars like the 1995-2001 Nissan Maxima, 1996-2001 Infiniti I30, and 2003-2006 350Z / G35 / FX35. Always verify your crank journal and housing dimensions before installing to ensure proper fit and oil clearance.