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The BlastMaster kit for Kleinn HK8/630 horns upgrades air delivery by adding two extra solenoids, oversized 1/2" air line, and all fittings required to put a separate solenoid on each trumpet. Designed for Model 230 and 630 horns that use the Model 307 solenoid valve, the kit increases airflow to boost sound output and support higher-pressure systems.
Kleinn HK8 / 630 Horns BlastMaster Valve Upgrade Kit
