Model HK7: Universal "Beast" Complete ABS Triple Train Horns / Onboard Air Kit
KL HK7
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Model HK7: Universal ProBlaster Beast ABS Triple Train Horns & Onboard Air Kit
Why the Beast Rules Its Class!
For the driver who demands a professional-grade locomotive blast without the investment of a full-metal HK9 systems, "The Beast™" Model HK7 has arrived. Engineered to outperform everything in its category, the high-impact ABS construction of the Model 230 Beast™ horns delivers a sharp, aggressive harmonic chord. The HK7 cuts through road noise with surgical precision, providing the signature Kleinn locomotive-style blast that defines a true statement of authority.
The Practical Pneumatic Powerhouse
The Model HK7 delivers elite performance without the bulk. Driven by the industry-exclusive Model 6350RC Waterproof Air Compressor, this system is more than just a horn—it’s a professional-grade onboard air command center. Whether you are delivering a deafening blast, inflating 35” tires, managing air bags, or engaging lockers, the HK7 provides high-pressure pneumatic power exactly when you need it.
Versatile Mounting Options
The Model HK7 is a lightweight, versatile system featuring the popular Model 6350RT 3-Gallon Air Tank internally coated for superior corrosion resistance and designed for a high-capacity/small-footprint balance, this tank is perfect for easy frame-rail or under-body mounting. For maximum installation flexibility, the detachable composite ABS horns can remain on the included flat rack mounting plate or be removed and mounted individually to fit tight spaces.
Why choose "The Beast” HK7
- The Beast™ 230 Train Horns: Precision engineered with three ABS Trumpets and Heavy-Duty zinc alloy drivers, these horns deliver a massive, authentic multi-tone locomotive blast. Built for the long haul, they combine huge sound and flexible mounting options, with ultimate durability.
- Industry-Leading Submersible Waterproof Compressor: Drive with total confidence through river crossings or monsoons by drawing air from inside the vehicle using the snorkel kit provided with the compressor.
- Maximum Output: With a consistent 150 PSI pressure design and a high-flow 2.11 CFM flow rate, this system is engineered for high-impact, authoritative horn performance. The 100% duty-cycle rating ensures the compressor is perfect for high-impact, loud, and authoritative blasts our clients rave about.
- Space-Saving Design: Engineered with an optimized footprint for a seamless fit in almost any vehicle. The versatile flat rack architecture allows you to install the system as a single unit or mount each horn individually, providing maximum flexibility for installation behind the bumper, on a frame rail, and other various custom configurations.
- Multi-Purpose Utility: Not just for horns—use the powerful onboard air system for tire inflation up to 37", managing air suspension / air bags, and small air tools. Includes the INF-1 inflator kit with a 24’ heavy-duty air hose and tire inflator with luminescent gauge.
- Advanced Corrosion Resistance: This 3-gallon air tank is treated with an internal anti-corrosion coating, preventing internal rust and ensuring a clean, moisture-free air supply for your accessories.
- Complete All-in-One Solution: This comprehensive kit includes Model 230 "Beast" Triple Train Horns, high-performance 6350RC waterproof compressor, and 6350RT 3-gallon air tank. It comes fully loaded with a sealed pressure switch, horn button, all required fittings, wiring, and hardware.
THE VERDICT: The Model HK7 "Beast™" is the definitive choice for drivers who demand a professional-grade blast and rock-solid reliability in a package size designed to fit almost any truck or SUV. The Beast delivers the authentic roar of locomotive excellence without the "Demon" HK9 or HK9-Slimline price tag.
What's included?
- (230) The Beast™ triple train horns: High-impact ABS trumpets designed for a loud, authentic locomotive blast.
- (6350RC) Waterproof air compressor: 100% Duty Cycle — 150 PSI fully sealed unit engineered to thrive in harsh environments.
- (6350RT) 3-gallon air tank: Features an internal anti-corrosion coating for superior rust resistance and long-term reliability.
- (INF-1) Tire inflator kit: 24’ air hose, tire inflator with luminescent gauge, and quick-connect coupler in a canvas storage bag.
- (2151) Pressure switch: Automated air management (110 PSI on / 150 PSI off).
- (FIT7) Air tank fitting pack: Complete set of necessary fittings for the 3-gallon system.
- Installation essentials: Horn button, Juice-1 thread sealant, airlines, complete wiring, and all necessary hardware.
BOOST YOUR BLAST: 30% MORE OUTPUT
Unleash the power of the Beast™ 230 Train Horns!
Push the 230 Beast™ horns to the edge of sanity with the Ultra BlastMaster™ (Model 6885). This upgrade allows you to unleash the fury of 30% more power by adding two additional Model VX6003 high-flow solenoids and swapping the standard 1/4" tubing for a massive 1/2" airline.
The result is bone-rattling decibel levels that demand respect across entire city blocks. Experience the 230 Beast in its most aggressive form—because when it comes to the ultimate train horn, "TOO LOUD" happens to be just right.
TOO LOUD? TOO BAD!
Air Horns vs. Train Horns
Find Your Signature Blast
Compact Air Horn Series
Engineered for "Emergency Vehicle" authority. This series delivers a sharp, high-frequency blast designed to cut through ambient noise instantly. With 3.5" bells, these horns produce a piercing scream that commands attention.
- Compact Horns: 102 / 130 / 141
- Kits: HK2 / HK3 / HK4
- Compact Horns: 101 / 102-1 / 130-1
- HK1 / HK2-1 / HK3-1 / HK4-1 / HKUTV / Vehicle Specific Kits: 102, 102-1
Train Horn Series
Don’t just make noise—make an impact. Engineered with massive 6-7" bells, our Train Horns move huge volumes of air to create a deep, earth-shaking rumble. This is the authentic tone of a classic 40,000-lb locomotive.
- Train Horns: 500 / 501 / 502 / 630
- Kits: HK6 / HK8
- Train Horns: 220 / 230 / 730
- Kits: HK5 / HK7 / HK9 / HK9-Slimline
Professional-grade engineering. Legendary Kleinn Performance.
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Train Horn Specifications |
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Triple ABS Train Horns |
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Part Number |
Model (230) “The Beast" |
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Number of horns |
3 (Flat Rack or Individual Mount) |
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Warranty |
1-Year Warranty |
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Construction |
Composite Black ABS Trumpets |
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Heavy Duty Brass Solenoid (12-Volt) |
P/N- VX6003 (51438 & 53814N Fittings Incl.) |
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Max Pressure |
150 PSI |
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Output (dB) @ 150 PSI |
155.1dB (156.9 dB w/ 6885 Upgrade Kit) |
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Dimensions (On Flat Rack Bar) |
18.5” L x 18” W x 7” H |
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Dimensions (Each Individual Horn) |
18.5” Lg. – 16.5” Med. - 14.5” Sm. |
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Minimum Tank Size Required |
2.5-Gallon |
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Airline Length and Size Included |
12’ of ¼” OD Airline |
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Upgrade kit compatibility |
Use Model 6885 |
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Air Compressor Specifications |
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Heavy-Duty Air Compressor |
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Part Number |
Model (6350RC) |
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Warranty |
1-Year |
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Compressor Type |
Waterproof Sealed, Oil-less |
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Motor Type |
Permanent Magnetic Motor |
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Waterproof & Submersible |
Sealed Internally (Must install “Snorkel” Kit) |
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Compressor “Snorkel Kit” |
Remote Air Filter Relocation Kit- 12' 3/8” Airline |
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Voltage |
12-Volt DC |
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Duty Cycle |
100% @ 100 PSI (@ 72° F) |
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Flow Rate |
@ 0 PSI (13.8 Volts): 2.11 CFM |
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Max Pressure |
150PSI |
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Max Amp Draw |
21 Amps |
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Dimensions |
9.25” L x 4” W x 6.50” H |
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Mounting Holes |
7.32” L x 3.31” W (5mm Diameter) |
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Mounting Note |
Mountable in any position except upside down |
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Pressure Switch |
P/N 2151 (Works with 52175 Safety Valve) |
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Air Tank Specifications |
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3-Gallon Air Tank |
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Part Number |
Model (6350RT) |
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Warranty |
1-Year |
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Tank Capacity |
3-Gallon |
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Construction |
All Steel Design (Gloss Black Epoxy Finish) |
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Internal Coating |
Cortec Internal Anti-Corrosion Coating |
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Mounting Legs |
2 Legs w/ 4 Mounting Points |
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Air Tank Ports |
6 - 1/4" NPT Ports & 1 - 1/2" NPT Ports |
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Mounting Hardware |
Fitting Pack - 4 Bolts, Nuts, Washers |
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Max Pressure |
200 PSI |
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Dimensions |
21” L x 8” W x 10” H |
Air Tank Fill Rate Details
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Tank Capacity |
Tank Pressure Range |
Tank Fill Rate |
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2.5 Gallon |
0 - 150 PSI |
4 Min. 35 Sec. (+/- 10 Sec.) |
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2.5 Gallon |
110 - 150 PSI |
59 Sec. (+/- 5 Sec.) |
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5.0 Gallon |
0 - 150 PSI |
9 Min. 15 Sec. (+/- 10 Sec.) |
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5.0 Gallon |
110 - 150 PSI |
2 Min. 25 Sec. (+/- 5 Sec.) |
Installation Instruction Links:
230 Horn Disassembly Instructions
6885 Blastmaster Upgrade Kit Instructions

$839.95