King SI-Series Main Bearings (Set of 5) Subaru WRX 2002-2014 / STI 2004-2021 EJ20/EJ22/EJ25 (Including Turbo)

Product Description

Part #: MB5382SI

King SI-Series main bearings are replacement bearings designed for performance engines with a factory crankshaft. The bearings have an improved crankshaft finish for reducing microscopic ferrite peaks on improperly ground or polished nodular cast iron crankshafts.

King SI-Series main bearings feature improved oil clearance to reduce wear and increase engine life, which in turn reduces operating noise, vibration, and excess oil flow.

Note: Suits engines with thrust in #5 position