Main Bearing Set

GT86, BRZ

4U-GSE Engine

ACL Performance Bearings

STD, STDX, 0.025, 0.25

Replacement main bearings

• High performance Trimetal engine bearings
• Designed to withstand higher RPM conditions
• High strength overlay plate with reduced thickness for improved fatigue properties

STD - For brand new or very healthy crankshafts

STDX - For fine tuning bearing clearances -0.025mm

0.025 - For damaged crankshafts that have been reground 0.025 under size 

0.25 - For damaged crankshafts that have been reground 0.25 under size