This is a direct-fit, bolt-on Flex-A-Lite® dual electric-fan system for 1992-1999 Chevrolet and GMC trucks, Suburbans, Tahoes and full-size Blazers and Yukons that have a 34-inch radiator core. You can recover up to 17 horsepower and 20 lbs-ft. of torque while also improving fuel economy by replacing your stock clutch fan assembly with this dual electric fan system. It features two 15-inch electric fans and a Flex-A-Lite Variable Speed Controller that varies the fan speed from 60-100 percent, depending on radiator temperature. These powerful fans move up to 5,500 cfm of airflow!