To provide the exact degree of cooling needed, Horton's VS viscous directly-controlled fan drive uses adjusts its output using pulse-width-modulation (PWM) signals from the engine management system.

All the benefits of Horton's DM Advantage Two-Speed fan clutch, specifically designed for engines that are tight on assembly space. By switching between eddy current and spring-actuated cooling, the Horton DM Advantage Two-Speed fan clutch helps maximize what's possible from a truck's power supply.