This 2017 Chevrolet Silverado 2500HD was built by Drivelines Plus Offroad Center. It features a custom kit that includes a 12-Gallon Tank, Shocker XL Train Horns, Katrina Train Horn, and four Viair 444c Stealth Black Compressors. Making this one super loud and heavy-duty kit. The tank provides about 20 seconds of blast time with the horns as well as enough volume for any other pnuematic uses. Both the Shocker XL Train Horns and the Katrina Train Horn pack a loud intense train horn sound. Giving you the loudness and deep tone that you are looking for.