Unlike some other air systems, HornAir kits come with 10 and 18 gauge wire, and a complete wiring kit including a fuse holder. This takes out the guesswork on your end and helps ensure your system is installed correctly. The kit only weighs 19 lbs installed and provides 2 gallons of 150 PSI air. The fast-filling 325C air compressor can recharge the tank from 110 to 150 PSI in just under 50 seconds. The fitting kit includes a safety blow-off and drain cock, and leaves one port spare so you can easily install another accessory. This package is perfect for filling up load-leveling air springs. If your truck has air springs without a compressor setup, this is the perfect compliment. Please note that if you use horns, you will still need an air valve kit to connect the system properly. Another great feature of HornAir systems is that they come with a standard 1/2" OD push-to-pull fitting. This means the horns you hook up with get all the air they need.