A high quality regulator / rectifier which replaces the O.E.M. part. This regulator / rectifier has the same housing shape as the O.E. part and fits in the same location. Heavily upgraded rectifier bridge built in. Extra heavy-duty regulator circuit. Output voltage is controlled tightly resulting in a nice and stable charge rate for your battery. Efficient heat sink dissipates the heat quickly and efficiently making for a very reliable unit. Designed to be a plug-in replacement. All regulator / rectifiers come with a full one-year warranty. Detailed Specifications: A small 12V AC regulator that should be used in AC lighting systems on dirt bikes and some ATVs. These systems have a lighting output coming from the stator that feeds the headlight, and this regulator will prevent the voltage from going over 13V to keep your bulbs from blowing due to over voltage.