ACL Main Bearing High Performance 0.50mm Oversized Set, #3 Thrust Bearing Position WRX 2002-2014 / STI 2004-2021 Subaru Turbo Models | 5M8297H-.50

ACL's main bearings are crafted from a softer metal. This helps prevent wear on your crank and engine block. A thin oil layer lubricates the connection between the bearings and the crank, letting the crank 'float' and minimizing wear. Proper support from these main bearings is vital to stop 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. However, they experience more wear during startup. We suggest these be bought by experienced professionals only. When buying Subaru main bearings, note that they're specific to either a #5 or #3 journal bearing position. This isn't related to VIN or year. You must know this before buying. Engine internals aren't eligible for exchange or return, so make sure you pick the right bearings.

Using these ACL main bearings is straightforward. First, ensure you've correctly identified whether you need the #5 or #3 journal bearing position for your Subaru model. Once you've installed them, the thin oil layer will lubricate the connection with the crank, allowing it to operate smoothly. As these bearings can handle high - horsepower motors well, they're great for high - performance engines. However, keep in mind that they may experience more wear during startup. Only experienced professionals should purchase and install these bearings. For maintenance, regularly check the oil level and quality. A proper oil supply is crucial for the longevity of the bearings. Also, monitor the engine's balance and performance. If you notice any unusual vibrations or noises, it may be a sign that the bearings need inspection or replacement. Remember, engine internals like these bearings aren't returnable, so double - check your needs before making a purchase.