ACL Main Bearing Duraglide 0.25mm Oversized Set, #3 Thrust Bearing Position WRX 2002-2014 / STI 2004-2021 Subaru Turbo Models | 5M8297A-.25

ACL's main bearings are crafted from a softer metal. This protects your crank and engine block from wear. A thin oil layer lubricates the connection between the bearings and the crank, letting the crank 'float' and minimize wear. Proper support from main bearings is essential to prevent oscillations and wear that can harm the crankshaft and other parts as the engine gets out of balance. Bearings with extra oil clearance can handle the stress of high - horsepower motors better, but they'll experience more wear during startup. We suggest these be bought by experienced professionals only. Remember, Subaru main bearings are specific to either #5 or #3 journal bearing positions. The journal bearing position isn't determined by VIN or year. You must know this before buying. Since engine internals aren't eligible for exchange or return, make sure you get the right bearings.

Using these ACL main bearings is straightforward. First, make sure you've correctly identified the journal bearing position (#3 in this case) for your Subaru WRX or STI turbo model. Then, carefully install the bearings in the appropriate spots. During startup, keep in mind that these bearings with extra oil clearance will experience increased wear, so it's important to start the engine gently. As for maintenance, regularly check the oil levels and quality. The thin layer of oil is crucial for the bearings' performance. If you notice any unusual noises or vibrations from the engine, it could be a sign of bearing wear. Since these are complex engine components, if you're not an experienced professional, it's best to consult a mechanic. Also, remember that once you've installed these bearings, they can't be exchanged or returned, so double - check your purchase before installation.