Spark plugs require tremendous amounts of electricity to flash-and that's exactly what Subaru ignition coil provides. When the time comes that you'll have to replace that Subaru ignition coil of yours, make sure you get a replacement component that's built to give you lasting service. This ensures that your new Subaru ignition coil will fit and function just like your old component. It also guarantees that the Subaru ignition coil you're getting is one that you can easily install in your car, without requiring any product or ignition modifications.