My original fan was 12 inch and 800 cfm and covered exactly half of my radiator with a fan shroud. After the engine was overhauled, it couldn't stand the Las Vegas heat for two years and my water temperature rose rapidly at the break-in discs and brake lights. In hot weather, I resorted to a heater. Until I bought this fan. I had to remove the fan shroud to install this fan, but it covers enough area of my radiator to keep the water at 90 degrees in stop-and-go Las Vegas traffic. Very thin, easy to install and very quiet, this fan delivers 1350 CFM while drawing less than 10 amps! I highly recommend this fan for keeping your daily car cool in hot weather!