This is our wide variety of Onboard Air Systems. What makes each system different from the next is the tank and compressor combination used. Compressors come in a Constant Duty, Fast Fill, or Medium Duty giving each one specific things that they excel at. The bigger the tank the more air volume your system will have. Take a look below and find the perfect air system for you. Some air systems are best for just Horns and emergency pneumatic use. While others can be used for more heavier duty pneumatic use and as well Horns.