The UNDERHOOD 150 system from VMAC is a powerful rotary screw air compressor ideal for operating large-size air tools like post-pounders or jackhammers, meaning that it replaces large utility-mount or portable tow-behind air compressors. Mounting kits are available for Ford F-250 to F-600 Gas and Power Stroke Diesel vehicles as well as RAM 3500 to 5500 Chassis Cab Cummins Turbo Diesel trucks.