King SI-Series Main Bearings (Set of 5) Subaru WRX 2002-2014 / STI 2004-2021 EJ20/EJ22/EJ25 (Including Turbo) universal Rear Spring Rate: 7K

Rear Spring Rate: 7K

Trivalent metal plating provides superior anti-corrosion and anti-seizing properties

Part #: DS618105511415SMF

Check out the COBB Subaru Hot Pipe Kit for your 2015-2021 Subaru WRX

King SI-Series Main Bearings (Set of 5) Subaru WRX 2002-2014 / STI 2004-2021 EJ20/EJ22/EJ25 (Including Turbo) universal Rear Spring Rate: 7KPart #: 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.