Here is a link for the specs http://www.summitracing.com/parts/flx-180 Comes with all the wiring neccesary for installation. I installed a supercharger and have no clearance with pulley. It is awesome keeping temps down. I swear i ran 1/4 and temp never went over 195. They are pretty good. Cost $330 new. Im asking $200 shipped. Need it gone yesterday.