ACL 5M2964H-.025 Oversized Main Bearings for 1987-2002 Nissan SR20DE/DET

Vehicle Fitment

• 1987-2005 Nissan Pulsar (SR20DE/DET; selected model years)
• 1991-2002 Nissan NX (SR20DE/DET)
• 1991-2001 Nissan Sentra (SR20DE/DET)
• 1995-1998 Nissan 200SX (SR20DE/DET)
• 1991-2002 Infiniti G20 (SR20DE/DET)

Features

• ACL Race Series high-performance main bearing set engineered for elevated RPM and performance use
• 0.025 mm oversized shells - used when crank journals are undersized during rebuild
• Tri-metal construction with hardened steel backing for strength and fatigue resistance
• 3/4-grooved main bearings to optimize oil distribution and load-carrying surface
• Increased crush retention for secure fit in housing
• Eliminated flash plating for improved heat transfer and housing grip
• Tight, consistent wall tolerances for predictable clearances
• Enlarged ID chamfers to accommodate larger crankshaft fillet radii

Specifications

• Part Number: 5M2964H-.025
• Brand: ACL
• Series: Race Series Main Bearing Set
• Size: 0.025 mm Oversized
• Oil Clearance: Standard
• Material: Tri-metal with hardened steel backing
• Position: Main crankshaft bearings - upper & lower halves
• Crank Journal Range (Std): 2.1636-2.1646 in / 54.956-54.980 mm
• Housing Bore Range (Std): 2.3206-2.3216 in / 58.944-58.968 mm
• Max Wall at Crown: ~1.975 mm / 0.0778 in
• Max Overall Length: ~19.10 mm / 0.752 in

Included Components

• 4x Upper main bearing halves - 0.025 mm oversized
• 4x Lower main bearing halves - 0.025 mm oversized
• Installation guide and packaging

Product Description

The **ACL 5M2964H-.025 Oversized Main Bearing Set** is designed for high-performance and rebuilt Nissan SR20DE and SR20DET engines - 2.0 L inline-4 DOHC powerplants used widely in late-'80s through early-2000s Nissan and Infiniti models like the Pulsar, NX, Sentra, 200SX, and G20. This 0.025 mm oversize set is specifically sized for applications where the crankshaft journals have been machined undersize during rebuilds or performance machining to restore correct bearing clearances.

Built with ACL's Race Series technology - featuring precision tri-metal construction with hardened steel backing - these main bearings provide the strength and durability needed for higher RPM and demanding driving conditions. The 3/4-grooved design enhances oil flow and load support while tightened wall tolerances help ensure consistent clearances. Oversized bearings such as this set are essential for ensuring correct lubrication and bearing film formation after crankshaft grinding, making them a reliable choice for engine rebuilds and performance upgrades.