5A. Pay attention now because this next tip will save your engine in the event of a valvetrain failure. We run a Filtermag on all of our engines because they work. It's exactly what you think it is: a high powered magnet for your oil filter that will make ferrous metals stick to the walls of the filter instead of trying to pass through the filter media. Should a mechanical failure occur within the engine, like a broken lifter or flattened cam lobe, the Filtermag will keep those pesky metal particles from entering the oil system and ending up in the bearings. Check out the photos if you want proof. Look at all of that metal debris trapped up against the wall of the filter where the Filtermag is positioned -- that debris came from a hydraulic roller lifter breaking.