The HornAir 244 was developed for people who want extreme loudness, and extra long blasts, but don't have room for a larger air tank. This system included a compact 2 gallon air tank, but has a 200 PSI capable compressor, providing fast 200 PSI fills and a more powerful blast from your horns. With 200 PSI you get more out of the 2 gallon tank since theres more air packed into it. Having onboard air has never been so easy. HornAir packages come with everything you need to install a fully functional air system on your vehicle.