This ACL High Performance Main Bearing Set is sized for a stock, unmachined 4B11T crankshaft journal (Standard) with additional built-in oil clearance for high-RPM, high-performance use. It fits the turbo four-cylinder used in the 2008, and 2010-2015 Mitsubishi Lancer Evolution X, in GSR and MR trims.
Specifications:
- Type: Main Bearing Set
- Series: High Performance
- Size: Standard, w/ Extra Oil Clearance
- Engine Fitment: Mitsubishi 4B11T (2008+ Evo X)
- Part Number: 5M1237HX-STD
FAQ
What does "w/ Extra Oil Clearance" mean?
It's a Standard-size bearing built with a wider oil clearance than the base Standard part, aimed at high-RPM, high-performance use.
What vehicles does this fit?
The 4B11T-powered 2008, and 2010-2015 Mitsubishi Lancer Evolution X, in both GSR and MR trims.
Is this a main or rod bearing set?
Main bearing set - it supports the crankshaft in the engine block.

