ACL Main Bearing Race Series 0.025mm Oversized Sets Nissan 350Z VQ35DE 2003-2006 | 4M2633H-.025

ACL is the ultimate choice for engine builders due to its outstanding quality and consistency. As an Original Equipment supplier, you'll find ACL bearings in numerous cars on the road. Many racers, especially those into import racing, highly trust both their stock and performance - series crankshaft rod and main bearings. ACL premium bearings outlast OEM ones, and their special coating process helps prevent early engine bearing failures and costly engine damage. The ACL Race Series performance bearings are designed for extreme endurance in harsh conditions. When you're running high RPMs and big boost, you don't have to worry about fatigue, stress wear, and failure with ACL's top - notch metallurgy. When ordering bearings, remember that engine bearings need proper tolerance measurement before purchase. If you're unsure about the bearing size for your build, consult a professional engine builder. We can't accept returns or exchanges for incorrectly ordered bearings or any engine internal components. ALC's main bearings are made of softer metal to protect your crank and engine block. A thin oil layer lubricates the bearing - crank connection, allowing the crank to 'float' and reduce wear. Proper main - bearing support is vital to prevent oscillations and wear that can damage the crankshaft and other components as the motor gets out of balance. Bearings with extra oil clearance can handle higher - horsepower motors better but experience more wear during startup. We recommend these for experienced professionals only.

How to use: First, make sure you've measured the proper tolerance of your engine to choose the right size of ACL bearings. Then, carefully install the bearings in your engine, ensuring a proper fit between the bearings and the crank. Note that engine bearings need to be measured for tolerance before purchase. If you're not sure about the size, it's best to ask a professional engine builder. We can't take back or exchange incorrectly ordered bearings. Maintenance advice: Regularly check the oil level and quality as the oil lubricates the bearings and the crank. If you notice any unusual noises or vibrations from the engine, have it checked immediately. Also, if you're using bearings with extra oil clearance, be aware that they may wear more during startup. These are best for experienced professionals who can handle the special requirements.