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. This design prevents wear on your crank and engine block. A thin oil layer lubricates the bearing - crank connection, letting the crank 'float' and cut down on wear. Proper support from these main bearings is vital. It stops oscillations and wear that can harm the crankshaft and other parts when the motor gets out of balance. Bearings with extra oil clearance can handle the stress of high - horsepower motors better. However, they'll wear more during startup. We suggest these be bought by experienced pros only. When buying, note that Subaru main bearings are for either #5 or #3 journal bearing positions. This isn't related to VIN or year, so you must know it before purchase. Engine internals can't be exchanged or returned, so make sure you get the right bearings.

Using these ACL main bearings is straightforward. Just install them in the correct journal bearing position (#5 or #3) as required for your Subaru WRX or STI model. But here's a heads - up: since these bearings are for high - performance use, it's best if an experienced professional does the installation. When starting your engine, be aware that bearings with extra oil clearance may wear more initially. For maintenance, regularly check the oil level and quality. The thin oil layer is crucial for the bearings' performance, so keep an eye on it. If you notice any unusual noises or performance issues, it's time to have the bearings inspected. And remember, once you've installed these engine internals, they can't be exchanged or returned, so double - check before you buy.