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 prevents your crank or engine block from wearing out. There's a thin oil layer between the bearings and the crank. It lets the crank 'float', which greatly cuts down on wear. Proper support from these main bearings is super important. It stops oscillations and wear that can harm the crankshaft and other parts when the engine gets out of balance. Bearings with extra oil clearance can handle the stress of high - horsepower motors better. But they'll wear more during startup. We suggest only experienced pros buy these. When buying Subaru main bearings, know they're for either a #5 or #3 journal bearing position. This isn't related to the VIN or year. You must figure it out before buying. Since engine internals can't be exchanged or returned, make sure you get the right bearings.

How to use: These main bearings are designed to be installed in the engine where the #3 thrust bearing position requires them. Make sure to clean the engine block and crankshaft thoroughly before installation. Then carefully place the bearings in their proper spots. Note that you need to know whether you need the #5 or #3 journal bearing position, and this isn't based on the vehicle's VIN or year. It's crucial to get this right as engine internals can't be exchanged or returned. Maintenance advice: Check the oil regularly. The thin oil layer between the bearings and the crank is key to reducing wear. If you notice any unusual noises from the engine or a decrease in performance, it might be time to inspect the bearings. Remember, bearings with extra oil clearance absorb more stress from high - horsepower motors but wear more during startup, so be extra cautious during the startup phase.