Kleinn Air Horns · New
Kleinn Triple Black Horn Kit w/ 150 PSI Waterproof 5.0 gal Air Tank
MPN HK9 · Store SKU kleHK9
Supplier stock checked 11/7/2026, 9:03:37 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 HK9 ProBlaster Triple Train Horn Kit stands as the brand's ultimate, biggest, and loudest train horn system, featuring the Demon Model 730's massive and detachable XCR 2.0 spun steel trumpets measuring 18.25, 14.25, and 11 inches in length with a mounting base that adds an additional 3.5 inches. Engineered to allow for a wide variety of versatile, individual, or combined installation configurations, this heavy-duty system is powered by a high-output 150 PSI, 100% duty cycle waterproof air compressor paired with a massive 5-gallon steel air tank. Complete with a bonus tire inflation kit and storage bag, this robust onboard air setup packs more than enough punch to power your horns alongside auxiliary accessories like air bags and small air tools, and for maximum performance, it can be upgraded with an Ultra BlastMaster valve upgrade kit (P/N 6890) to create the loudest, largest, and most aggressive train horn setup available on the market. ProBlaster ultimate triple train horn package w/730 horn, 5-gallon tank and 150 PSI air system. Kleinn Universal Demon 730 Train Horns / Onboard Air Kit - 5-Gal Tank - 150 PSI
Manufacturer fitment & guides
Check HK9 against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
