This is a Custom 2016 GMC 3500 Mega Cab Denali. Elite Customs 775 built this truck to go to the 2017 Sema Show. With this truck being as unique as it is with all the custom work to be a mega cab. We had to make sure to pick wisely when it came to this kit. So with this being such an amazing piece of Craftsmanship, we had to pair it with the intense loudness of our Shocker XL Train Horns. So not only does it stand out with its looks but now with the loudness as well! The kit installed on this truck is our Conductor's Special 244K Nightmare Edition Train Horn Kit. It comes with our 2-gallon Air Tank and a powerful 444C Viair Stealth Black Air Compressor. Giving you about 5-7 seconds of blast time and the ability to air up a tire or two. This is the perfect Onboard Air System as well as Train Horn Kit.