MMX Performance Magnetic Oil Sump Drain Plug - M12x1.5Fits oil pans with M12x1. 5 thread. The MMR Performance BMW Magnetic Sump Oil Pan Plug is a simple yet effective upgrade that can dramatically increase your engine's lifespan. As an engine wears, tiny metallic particles become suspended in the oil, accelerating wear each time you drive. Our magnetic sump plugs will help to separate these ferrous particles. There's no avoiding it your engine's contact surfaces wear a tiny amount each time it runs. So