This is Will's 1993 Volkswagon EuroVan and it has a Conductor's Special Kit installed on it. The Shocker XL Train Horns featured in this kit are super loud and have an authentic train horn sound. Pictured below you can see that the 4 horns were mounted to the roof.
Inside the cab you will find the 2-gallon air system used to power the horns. This system features our 2-gallon 6 port air tank and a Viair 480C air compressor.