ACL Main Bearing High Performance 0.25mm Oversized Set, #3 Thrust Bearing Position WRX 2002-2014 / STI 2004-2021 Subaru Turbo Models | 5M8297H-.25

ACL's main bearings are crafted from a softer metal. This smart design keeps your crank and engine block from wearing out. A thin oil layer lubricates the space between the bearings and the crank. This lets the crank 'float', significantly cutting down on wear. Main bearings are essential for proper support. They prevent 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. Remember, Subaru main bearings are for either a #5 or #3 journal bearing position. This isn't related to VIN or year. You need to know it before buying. Engine internals aren't eligible for exchange or return, so be sure which bearings you need.

Using these ACL main bearings is straightforward. First, make sure you've correctly identified the journal bearing position (#5 or #3) your Subaru turbo model needs. Install them carefully following your vehicle's engine assembly instructions. When starting up, be aware that bearings with extra oil clearance may experience more wear. It's a good idea to let the engine warm up gently. As for maintenance, regularly check the oil level and quality. Clean oil is key to keeping the bearings lubricated and reducing wear. If you notice any unusual noises or performance issues, have your engine inspected by a professional. Also, since these are for high - performance engines, it's best to leave the purchase and installation to experienced professionals.