For Model 730 train horns. Increase air flow and push your train horn to unheard of decibel levels. The Ultra BlastMaster™ provides everything you need to add an additional two VX6003 solenoid valves to your Model 730 Demon™ train horns. The Ultra Blastmaster valve upgrade will push your Demon™ over the edge. Prepare your eardrums; they’re screwed.
