Generac 5616 Extreme Cold Weather Kit for 25 kW (1800 RPM), 22 kW, 27 kW, 36 kW, 45 kW & 60 kW (2.4L Engine) Standby Generators Includes the appropriate block heater, step by step installation instructions and all necessary mounting hardware See an authorized dealer to properly install this item Operates with Cold Weather Kit model 5630 For Generac 22, 27, 36, 45 and 60 kW automatic standby generators