The BlastMaster Plus upgrade kit is built to add two VX6003 all-brass solenoid valves to Kleinn Model 230 train horns. By giving each trumpet a dedicated solenoid and increased air flow, the kit raises the horn’s sound output. It includes the fittings needed to integrate additional solenoids with compatible Model 230 setups to maximize airflow through the trumpets.
Kleinn HK7 / 230 Horns BlastMaster Plus Valve Upgrade Kit