Air Horn Compressor Kit Ultra BlastMaster Upgrade Kit; For Use w/PN; Incl. Two High Performance VX6003 Valves; Fitting; Air Line; FEATURES: Increased Air Flow For Unheard Of Decibel Levels Adding Solenoids Increases Performance And Horn Volume Dramatically Increase Air Flow Two High Performance Vx6003 Valves Included Fittings Included Airline Included For Model 730 Demon For Model 730 train horn only. Increase air flow and push the Model 730 Demon(TM) to unheard of decibel levels. The Ultra BlastMaster(TM) provides everything you need to add an additional two VX6003 solenoid valves to your Model 730 Demon(TM). Adding two more solenoids allows each trumpet to have a dedicated air source for dramatically increased flow and a train horn that will push your Demon(TM) over the edge. Prepare your eardrums; they're screwed. Kleinn automotive air horns offers complete air horn kits, train horns, roof mount truck horns, air systems kit accessories and off road lift kits.