The Caterpillar CT660 2011 and newer pre-filter for HVAC is a practical and essential addition to your vehicle. This pre-filter is designed specifically for the Caterpillar CT660 2011-UP model and includes all necessary hardware for easy installation. The pre-filter helps to keep your cab air clean and free from debris, ensuring a comfortable and healthy environment for the driver. Simply place the filter squarely over the air intake and use the provided screws to secure it in place. This pre-filter is a must-have for maintaining the HVAC system in your Caterpillar CT660.