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

Part #: MB5382SI. King SI - Series main bearings are top - notch replacement parts for performance engines with factory crankshafts. They offer an enhanced crankshaft finish, which helps smooth out tiny ferrite peaks on nodular cast iron crankshafts that may not be ground or polished perfectly. These bearings also have improved oil clearance. This not only reduces wear and extends the engine's lifespan but also cuts down on operating noise, vibration, and excessive oil flow. Note: Ideal for engines with thrust in the #5 position.

Using these King SI - Series main bearings is straightforward. When you're installing them, make sure your engine has thrust in the #5 position as specified. Before putting them in, check the crankshaft for any obvious damage or rough spots. Once installed, keep an eye on the engine's performance and oil levels regularly. As for maintenance, change the engine oil at the recommended intervals. This will help keep the bearings in good condition and ensure they continue to reduce wear and noise in your engine. If you notice any unusual noises or a drop in performance, it's a good idea to have your engine checked by a professional.