Mishimoto has released a magnetic drain plug that will be included with all new radiator applications. Dont know if that means only new applications that are released or all their applications including older released units. We noticed the Honda Civic application for 92-00 has the magnetic drain plug so they must mean all applications. Metal particles could be floating in your cooling system but with this drain plug installed you could catch them. I dont know about you but with a Aluminum radiator, aluminum block and aluminum head there is little chance a steel particle present in the cooling system. We all know aluminum doesnt stick to magnets. The water pump propeller is usually stamped steel on the honda civic but have never been known to fall apart. Its a great attempt to offer a better product but more of a sales pitch then something that offers benefits. We do wonder if Mishimoto has ran into a few units where a metal particle has damaged the radiator. This might have been on other motors with more metal construction like Ford. This would be the only reason we logically see the Magnetic Drain Plug introduced.
Mishimoto Magnetic Drain PLugMishimoto Magnetic Drain Plug

09/25/09 – NEW MAGNETIC DRAIN PLUGS