Brand new, genuine import from Mugen Japan The Mugen Low Temperature Fan Switch reduces the cooling fan's activation temperature to 80c from the stock setting of 98 degree C, thus improving the radiator's cooling efficiency. A great item that truly works! Easy to install. Fit all Honda K, F, D, B series engine, like the following US model Honda 94-01 Acura Integra 02-06 Acura RSX 92-00 Honda Civic 02-05 Civic Si 93-97 Honda Del Sol 00-05 Honda S2000 04-07 Honda TSX. It requires the use of Mugen low-temp thermostat to work together!