ACL Race Conrod Bearings Set Subaru EJ20/EJ22/EJ25 (52mm Journal)

King Racing Conrod Bearings – 4B8296H Series (STD, 0.025, 0.25, 0.50)

King Racing 4B8296H conrod bearings are purpose-built for high-revving, high-load performance engines, replacing standard rod bearings in builds that demand greater fatigue resistance. They use F781 tri-metal construction with race-developed tolerances for precise oil control and long service life under extreme conditions.

The 4B8296H series suits motorsport and high-performance street engines, with design features intended to maintain oil film integrity and minimise wear under aggressive tuning and sustained high-RPM operation. Installation by a qualified professional engine builder is recommended, as bearing clearances must be measured and verified during assembly.

This listing covers

• Engines requiring 4B8296H-series conrod bearings
• Motorsport and high-output performance engine builds
• Available sizes: STD, 0.025, 0.25 and 0.50

Note: HX variants with extra oil clearance are available (for example, 4B8296HX) for tighter race applications or where increased bearing-to-journal clearance is required.

Key features

• High-performance tri-metal bearing using F781 material
• Hardened steel backing for improved support and housing retention
• Reduced overlay thickness for better fatigue resistance
• Increased crush for consistent bearing retention
• No flash plating, for superior heat transfer and grip
• Tight, consistent wall tolerances for precise oil clearance
• Enlarged ID chamfers to suit large-radius performance crankshafts

Specifications (STD size)

• Material: F781 tri-metal
• Minimum standard shaft size: 51.984 mm
• Maximum standard shaft size: 52.000 mm
• Minimum standard tunnel size: 55.000 mm
• Maximum standard tunnel size: 55.020 mm
• Maximum wall at crown: 1.5 mm
• Overall length: 16.5 mm
• Half type: identical halves
• Available sizes: STD, 0.025, 0.25, 0.50

Shop more: ACL Performance Engine Bearings · ACL Subaru EJ & FA20 Engines (WRX, STI, BRZ & Toyota 86)

Need help choosing? Contact our team at sales@chicaneaustralia.com.au.