Kleinn Air Horns · New
Kleinn Ultra HK9 730 Horns BlastMaster Valve Upgrade Kit
MPN 6890 · Store SKU kle6890
Supplier stock checked 11/7/2026, 10:14:21 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
The Kleinn Model 6890 Ultra BlastMaster Valve Upgrade Kit is specifically engineered for the Model 730 Demon triple train horn system to dramatically increase air flow and push your horn to unheard-of decibel levels. This high-performance kit provides everything needed to integrate an additional two VX6003 solenoid valves into your existing 730 Demon setup, giving each individual horn trumpet its own dedicated air source for maximum pneumatic efficiency. The comprehensive package also includes a heavy-duty 4-way splitter and premium 1/2" OD airline tubing with matching fittings, ensuring each horn receives an increased volume of air to maximize sonic output and deliver an earth-shattering blast. Kleinn Model 6890 - Blastmaster Upgrade Kit - For Model 730 Demon Triple Train Horns Model 6890 - Blastmaster Upgrade Kit - For Model 730 Demon Triple Train Horns
Manufacturer fitment & guides
Check 6890 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
