ACL 4M2737HX-STD Race Series Main Bearing Set for 1984-2004 Nissan VG30 Engines

Vehicle Fitment

• 1984-1996 Nissan 300ZX (VG30DE/T/DETT engines)
• 1987-1988 Nissan 200SX (VG30DETT)
• 1990-1994 Nissan D21 Pickup (VG30DETT)
• 1999-2004 Nissan Frontier (VG30DETT)
• 1985-1994 Nissan Maxima (VG30DETT)
• 1987-2000 Nissan Pathfinder (VG30DETT)
• 1993-2002 Nissan Quest (VG30DETT)
• 2000-2004 Nissan Xterra (VG30DETT)
• 1993-1997 Infiniti J30 (VG30DETT)
• 1990-1992 Infiniti M30 (VG30DETT)
• 1997-2000 Infiniti QX4 (VG30DETT)

Features

• ACL Race Series performance main bearing set designed for high-RPM endurance
• Tri-metal construction with high-strength overlay for improved fatigue resistance
• Extra +0.001" oil clearance for enhanced lubrication film and break-in flexibility
• Hardened steel backs improve bearing support and retention under load
• Increased crush for secure retention in housing
• Eliminated flash plating improves heat transfer and housing grip
• 3/4-grooved main bearing design optimizes load area and oil flow to rod bearings
• Tight wall tolerances ensure consistent clearances for performance engines
• Expanded ID chamfers accommodate large crank fillet radii common in performance builds

Specifications

• Part Number: 4M2737HX-STD
• Brand: ACL
• Series: Race Series Main Bearing Set
• Size: Standard (STD) with extra +0.001" oil clearance
• Material: Tri-metal construction with hardened steel backing
• Position: Main crankshaft bearings - upper and lower halves
• Included: 8 main bearing halves (4 upper, 4 lower)
• Application Type: Performance/high-RPM engines

Included Components

• 4x Upper main bearing halves
• 4x Lower main bearing halves
• Installation guide and packaging

Product Description

The **ACL 4M2737HX-STD Race Series Main Bearing Set** is a premium performance main bearing kit engineered for **Nissan VG30 engine families** - notably VG30DE, VG30DETT, and related variants used in a wide range of Nissan and Infiniti vehicles from **1984 through 2004** (including 300ZX, 200SX, D21 Pickup, Frontier, Maxima, Pathfinder, Quest, Xterra, J30, M30, and QX4) with applicable VG30 V6 engines. These bearings are built for enthusiasts and engine builders who demand durability and reliable lubrication under high-rpm and performance conditions, thanks to their advanced tri-metal design and optimized geometry.

Featuring hardened steel backs and an extra +0.001" oil clearance, the 4M2737HX-STD bearings provide improved heat transfer, hydrodynamic oil film formation, and crush retention compared to basic replacement bearings. The 3/4-grooved design increases oil distribution efficiency to critical bearing surfaces, making this set a strong choice for performance rebuilds, turbocharged VG30DETT applications, and motorsport-oriented builds where enhanced durability and consistent clearances are essential. ACL Race Series bearings have a strong motorsport pedigree and are designed to stand up to demanding use without sacrificing precision.