Kleinn Air Horns · New
Kleinn Triple Black Horn Kit w/150 PSI Waterproof 3.0 gal Air Tank
MPN HK9 Slimline · Store SKU kleHK9 Slimline
Supplier stock checked 11/7/2026, 5:03:39 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.
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Product details
The Kleinn HK9-Slimline ProBlaster Triple Train Horn Kit stands as the brand's biggest and loudest train horn system, uniquely equipped with a slim-design 3-gallon air tank for a much easier installation profile. This massive system features the Demon Model 730's detachable XCR 2.0 spun steel trumpets measuring 18.25, 14.75, and 11 inches in length to allow for a wide variety of versatile mounting configurations. Powered by a high-output 150 PSI, 100% duty cycle waterproof compressor, this heavy-duty onboard air system includes a tire inflation kit with a storage bag and packs enough punch to support auxiliary accessories like air bags and small air tools. For ultimate performance, the system can be upgraded with an Ultra BlastMaster valve upgrade kit (P/N 6890), making it the loudest, largest, and most aggressive train horn setup on the market. ProBlaster ultimate Demon 730 Stainless Steel triple train horn package, 3 Gal tank and 150 PSI air system with 1/2" airline Universal Demon Steel Train Horns / Waterproof Onboard Air System - 3-Gallon
Manufacturer fitment & guides
Check HK9 Slimline against the manufacturer’s application information below.
Part-specific notes
- California Proposition 65: Y
