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LABOR DAY SALE • 15% OFF SITEWIDE • PRICES AS MARKED
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LABOR DAY SALE • 15% OFF SITEWIDE • PRICES AS MARKED
KL HK1
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TIME TO RETIRE THAT WIMPY FACTORY HORN!
The Model HK1 is engineered specifically for drivers who demand maximum sonic impact and a discrete, "blacked-out" aesthetic, even in the most cramped mounting locations. This system provides the ultimate value by packing the raw, commanding authority of a professional air horn into our most compact, streamlined package yet. While other systems struggle to find space, the HK1's shorter trumpet design ensures you have the presence of a much larger vehicle, making it the perfect upgrade for those looking to replace a weak factory chirp with a high-impact blast that fits where others can't.
PROFESSIONAL-GRADE PERFORMANCE
At the heart of the system is the 6270RC waterproof sealed air compressor paired with dual trumpets featuring our signature XCR2.0 black zinc alloy finish. This heavy-duty combination is built to withstand the harshest elements while providing a sleek, muted look that disappears behind your grille. The 120 PSI air system is optimized for rapid recovery and includes a 0.5-gallon inner-coated steel tank, ensuring you always have a reliable air supply ready. It’s a rugged, oil-less design that prioritizes durability and consistent performance in any environment.
MAXIMUM SOUND – MINIMUM FOOTPRINT
The HK1 takes "compact" to the next level. Featuring horns that are even shorter than our HK2-1 model, this kit is the champion of tight installations and produces a high-screaming blast. Its ultra-low-profile design allows for a seamless fit in extremely restricted spaces, such as compact engine bays or narrow gaps behind the grille, where traditional air horns simply won't fit. By choosing the Model HK1, you are getting the same professional-grade "get out of the way" authority as our larger kits, but in a size that guarantees a fit for virtually any vehicle.
THE VERDICT: The Model HK1 Stealth Kit delivers our most compact and ultra-low-profile blacked-out design, making it the perfect solution for small engine bays or tight real estate spaces requiring a piercing, high-pressure dual scream.
The Screamer
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 in heavy traffic.
The Deep Rumble
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.
Professional-grade engineering. Legendary Kleinn Performance.
Too Loud? Too Bad!
AIR HORN SPECIFICATIONS
| Mini Dual Black Air Horns | |
|---|---|
| Part Number | Model 101 |
| Number of Horns | 2 Horns (Single Mount) |
| Warranty | 1-Year Warranty |
| Construction | XCR 2.0 Black Coated Stainless Steel |
| Vortex 4 Chrome 12v Solenoid | P/N- 307 w/ ¼” Airline Input |
| Min / Max Pressure | 120 - 150 PSI |
| Output (dB) @ 150 PSI | 146.2 dB |
| Dimensions | 11.5” L x 6” W x 3.75” H |
| Minimum Tank Size | 0.5-Gallon |
| Airline Input Size | 1/4" OD Airline |
AIR COMPRESSOR SPECIFICATIONS
| 12-Volt Light-Duty Compressor | |
|---|---|
| Part Number | Model 6270RC |
| Warranty | 1-Year |
| Max Pressure | 120 PSI |
| Duty Cycle | 25% @ 100 PSI (@ 72° F) |
| Flow Rate | @ 0 PSI (13.8 Volts): 1.56 CFM |
| Compressor Type | Waterproof Sealed, Oil-less |
| Voltage | 12-Volt DC |
| Motor Type | Permanent Magnetic Motor |
| Max Tank Size | 0.5 Gallon |
| Max Amp Draw | 14 Amps |
| Dimensions | 6.4” L x 3.5” W x 4.6” H |
| Mounting Holes | 6.14” L x 2.76” W (5mm Diameter) |
| Mounting Note | Mount in any position except upside down |
| Shipping Weight | 7 lbs |
| Pressure Switch/ Safety Valve HK1-HK2 | P/N 2121 (Pair w/ 52145 for 120 PSI kits) |
| Pressure Switch/ Safety Valve HK3-HK4 | P/N 2131 (Pair w/ 52155 for 130 PSI Kits) |
AIR TANK SPECIFICATIONS
| 0.5-Gallon Air Tank | |
|---|---|
| Part Number | Model 6260RT |
| Warranty | 1-Year |
| Tank Capacity | 0.5-Gallon |
| Construction | All Steel Design (Gloss Black Epoxy Finish) |
| Internal Coating | Cortec Coating for Corrosion Resistance |
| Mounting Legs | 1 Leg w/ 2 Mounting Points |
| Air Tank Ports | 5 - 1/4" NPT Ports |
| Mounting Hardware | Fitting Pack - 2 Bolts, Nuts, Washers |
| Max Pressure | 150 PSI |
| Dimensions | 8” L x 6” W x 8” H |
AIR TANK FILL RATE DETAILS
| Tank Capacity | Tank Pressure Range | Tank Fill Rate |
|---|---|---|
| .5 Gallon | 0 - 150 PSI | 1 Min. 11 Sec. (+/- 5 Sec.) |
| .5 Gallon | 110 - 150 PSI | 26 Sec. (+/- 3 Sec.) |
| 1 Gallon | 0 - 150 PSI | 1 Min. 57 Sec. (+/- 10 Sec.) |
| 1 Gallon | 110 - 150 PSI | 38 Sec. (+/- 5 Sec.) |
INSTALLATION INSTRUCTION LINKS:

$254.95
Kleinn Automotive Accessories stands behind the quality and craftsmanship of our products. Our products are covered against defects in materials and workmanship when properly installed and used under normal operating conditions, subject to the terms below.
Unless otherwise specified, Kleinn Automotive Accessories products are covered by a 1-year limited warranty from the original date of purchase.
This warranty applies to the original purchaser and covers defects in materials and workmanship under normal use.
If a product is determined to have a covered warranty defect, Kleinn Automotive Accessories will, at its discretion, repair or replace the defective product or component.
This warranty does not cover damage or failure resulting from:
Kleinn Automotive Accessories is not responsible for installation or removal charges, diagnostic fees, labor costs, vehicle downtime, loss of use, or other incidental or consequential expenses associated with warranty service.
To request warranty service, email warranty@kleinn.com with the following information:
A Kleinn representative will review your claim and may first attempt to resolve the issue through technical support.
If the product needs to be returned for inspection, Kleinn will provide a Return Authorization (RA) number and return instructions. Products should not be returned without prior authorization.
Once received, the product will be inspected to determine whether the issue is covered under warranty. If a covered defect in materials or workmanship is confirmed, Kleinn will, at its discretion, repair or replace the defective product or component.
If inspection determines that the product does not have a covered warranty defect, the product may be returned to the customer, and the customer will be responsible for applicable return shipping costs.
This limited warranty gives you specific legal rights. You may also have other rights, which vary from state to state.
Your item must be in its original unused condition to be returned, unless there is a manufacturer defect. You must return the item within 30 days of your purchase.
1. Please email support@kleinn.com to request a refund and we will assign you a Return Authorization #.
2. Mail your returned item to:
Kleinn Automotive Accessories
Returns Department
4045 N Highway Drive
Tucson, AZ 85705
3. Include in your package a signed letter stating the reason for your return and the original receipt.
Merchandise that has been worn, used, or altered will not be accepted for return or exchange.
All returns are subject to a 15% restocking fee, which will be deducted from your refund. If shipping and handling fees were applied to your order, they are non-refundable.