ACL Race Rod Bearings Standard Size 48mm Journal Extra Oil Clearance (4B8320HX-STD) | Subaru WRX 2002-2014 / STI 2004-2021

The ACL Race Rod Bearings Standard Size 48mm Journal with Extra Oil Clearance are engineered for Subaru WRX 2002–2014 and Subaru STI 2004–2021 EJ-series engines that operate under increased load, higher RPM, and elevated oil temperature conditions. Designed with HX specification for additional oil clearance, these race-series rod bearings enhance oil film stability and lubrication control in high-performance and motorsports EJ engine builds.

KEY FEATURES

• Race-series connecting rod bearings for EJ-series engines with 48mm rod journals
• HX specification provides extra oil clearance for demanding performance applications
• Improves oil film thickness and lubrication stability at high RPM
• Precision-manufactured for consistent bearing crush and accurate rod alignment
• Ideal for turbocharged, track-driven, and aggressively tuned EJ engine builds

TECHNICAL SPECIFICATIONS

• Bearing Type: Connecting rod bearing
• Journal Diameter: 48mm
• Size: Standard with extra oil clearance (HX)
• Engine Platform: Subaru EJ-series
• Material: High-performance tri-metal bearing alloy
• Design Intent: Increased oil clearance for improved lubrication stability under high load

VEHICLE FITMENT

• Subaru WRX 2002–2014
• Subaru STI 2004–2021

ACL manufactures precision-engineered engine bearings designed to deliver consistent oil clearance, improved load capacity, and reliable performance for street, performance, and motorsports engine builds.