ACL Main Bearing High Performance 0.025mm Oversized Set, #3 Thrust Bearing Position WRX 2002-2014 / STI 2004-2021 Subaru Turbo Models | 5M8297HX-STD

ACL's main bearings are crafted from a softer metal, safeguarding your crank and engine block from wear. A thin oil layer lubricates the bearing - crank connection, letting the crank 'float' and minimizing wear. Proper support from these bearings is vital to prevent oscillations and wear that can harm the crankshaft and other parts as the engine goes out of balance. Bearings with extra oil clearance can handle the stress of high - horsepower motors better, but they may experience more wear during startup. We suggest these be bought by experienced pros only. Note that Subaru main bearings are for either #5 or #3 journal bearing positions. The journal bearing position isn't related to VIN or year; you must know it 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 quite straightforward. First, make sure you know the correct journal bearing position (#3 in this case) for your Subaru turbo model. When installing, ensure there's a good oil layer between the bearings and the crank. This will help the crank 'float' and reduce wear. As for startup, be aware that these bearings with extra oil clearance may experience more wear at the beginning, so take it easy during the initial runs. When it comes to maintenance, regularly check the oil level and quality. If you notice any unusual noises or vibrations from the engine, it might be time to inspect the bearings. And remember, since these are engine internals, only experienced professionals should purchase and install them. Don't forget to double - check the bearing position before you buy, as they can't be exchanged or returned.