Model HK4-1: Universal ProBlaster Black Quad Air Horn Kit

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KL HK4-1

Regular price $439.95
Sale price $439.95 Regular price

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PROP 65 WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.

Model HK4-1: Universal ProBlaster™ Black Compact Quad Air Horn System

Stop Being Ignored. Start Being Heard. The Model HK4-1 is engineered specifically for drivers who demand maximum sonic impact and a discrete, "blacked-out" aesthetic. This system takes our best-selling platform to the next level by utilizing a quad-trumpet configuration to produce an even louder, richer, and more complex tone than standard setups. With four tuned trumpets, the HK4-1 ensures you have the undeniable presence of a much larger vehicle, making it the ultimate professional-grade upgrade to replace a weak factory chirp with a head-spinning blast.

Professional-Grade Performance At the heart of the system is a high-efficiency 130 PSI air compressor paired with a 1-gallon air tank. This rugged, oil-less system is designed for durability and "set it and forget it" reliability. Featuring integrated thermal protection and a complete wiring and installation kit, the HK4-1 offers a dependable solution for drivers who require consistent, high-pressure performance on demand. Whether you are navigating dense traffic or open highways, this system provides the air capacity needed to power through any situation.

Big Sound – Small Footprint Installation is simple thanks to the kit’s clever, low-profile design. Despite featuring four distinct trumpets, the compact footprint of the zinc alloy horns allows for a seamless fit in tight locations—such as behind the grille or tucked neatly inside the engine bay—where traditional train horns simply won't fit. By choosing the HK4-1, you are joining thousands of drivers who trust Kleinn Automotive Accessories for superior quality and "get out of the way" authority. Don’t settle for a vulnerable factory horn when you can have the quad-trumpet power of the Universal ProBlaster™ Stealth HK4-1.



WHY CHOOSE MODEL HK4-1?   

  • Quad-Tone Authority: Unlike standard horn kits, the quadruple-trumpet design delivers a startling, high-pressure quad-tone blast designed to pierce through the loudest traffic and heavy machinery.
  • Stealth Aesthetics: Featuring our signature Black XCR2.0™ Stealth finish, these horns are built to blend in behind your grille or fit neatly under the chassis while the coated trumpets remain resistant to corrosion.
  • Upgraded 130 PSI Power: We’ve boosted the output to a 130 PSI system, providing higher pressure for a louder initial blast and faster recovery times between uses.
  • Submersible Reliability: Equipped with the 6270RC waterproof air compressor, this system is designed to thrive in harsh environments, from off-road mud to coastal salt air.
  • Longer Blast: The upsized 1-gallon air tank allows for double the hang time on the horn blast.  
  • Universal Fitment: The clever, low-profile design allows for a seamless fit in tight locations where traditional, bulky train horns simply won't fit.

WHAT’S IN THE BOX?

  • 141-1: Quadruple XCR2.0 Coated Black Metal Compact Air Horns
  • 6270RC: 130 PSI Waterproof Air Compressor (25% Duty Cycle)
  • Snorkel Kit: Remote mount intake filter for clean air delivery (Draw air from inside the vehicle)
  • 6270RT: 1-Gallon steel air tank with internal anti-corrosion coating
  • FIT34: Fitting Pack (Sealed pressure switch, safety valve, and drain valve)
  • Installation Kit: Comprehensive wiring, airline, and all necessary hardware

 

Air Horns vs. Train Horns:

Find Your Signature Blast

The Screamer

Compact Air Horn Series

Engineered for "Emergency Vehicle" authority. Our compact series delivers a sharp, high-frequency blast designed to cut through the thickest noise instantly. Featuring high-pressure 1/4" airline and 3.5" wide bells, these horns produce a piercing scream that commands attention in heavy traffic or loud construction zones.

Classic Chrome
  • Air Horns: Models 102, 130, & 141
  • Universal Air Horn Kits: ProBlaster Models HK2, HK3, & HK4
Stealth Black
  • Air Horns: Models 101, 102-1, 130-1, 141-1
  • Universal Air Horn Kits: ProBlaster Models HK1, HK2-1, HK3-1, HK4-1, & HKUTV
The DEEP Rumble

Train Horn SERIES

Don’t just make noise—make an impact. Engineered with massive 6-7" end bells and heavy-duty drivers, our Train Horns move a staggering volume of compressed air to create a deep, earth-shaking rumble you can feel in your chest and hear down the block. This is the authentic tone of a 40,000-lb locomotive and the ultimate "clear the way" authority that every Truck and SUV deserves.

Classic Chrome

  • Train Horns: Models 500, 501, 502, & 630
  • Train Horn Kits: ProBlaster Models HK6 & HK8
Stealth Black
  • Train Horns: Models 220, 230, & 730
  • Train Horn Kits: ProBlaster Models HK5, HK7, HK9, & HK9-Slim

Professional-grade engineering. Legendary Kleinn Performance.

Too Loud? Too Bad


Air Horn Specifications

Quad Black Air Horns

 

Part Number

Model 141-1

Number of Horns

4 Horns (Single Mount)

Warranty

1-Year Warranty

Construction

XCR2.0 Black Coated Zinc Alloy 

Vortex 4 Chrome 12v Solenoid

P/N- 307 w/ ¼” Airline Input

Min / Max Pressure

120 - 150 PSI

Output (dB) @ 150 PSI

150.3 dB

Dimensions

14” L x 6” W x 6.5” H

Minimum Tank Size

0.5-Gallon

Airline Length and Size Included

12’ of 1/4" OD Airline

 

Air Compressor Specifications

12-Volt Light-Duty Compressor

Part Number

Model 6270RC

Warranty

1-Year

Max Pressure

130 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

1-Gallon Air Tank

 

Part Number     

Model 6270RT

Warranty

1-Year

Tank Capacity

1.0-Gallon

Construction

All Steel Design (Gloss Black Epoxy Finish)

Internal Coating

Internal 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

11” 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:

Compressor Overview & Instructions

Air Compressor Wiring Diagram

Horn Solenoid Wiring Instructions

Air Horn System Overview 

Air System Components

Model HK4-1: Universal ProBlaster Black Quad Air Horn Kit

$439.95

Does it come with a warranty?

One-Year Limited Defect Warranty for Kleinn Automotive Accessories:

Kleinn Automotive Accessories is committed to delivering high-quality products to our customers. We stand behind the craftsmanship and materials of our products by offering a comprehensive one-year limited warranty. This warranty is extended to the original purchaser, ensuring that when our products are installed properly and used under standard conditions, they will be free from defects in workmanship and materials for a period of one year from the original date of purchase.

This warranty encompasses a promise that the product you have purchased will perform as expected under normal use conditions and will not suffer from flaws in materials or craftsmanship. However, it is important to note that this warranty does not cover any damage that results from abusive use, operation that is not in line with the product’s intended purpose, or harm resulting from exposure to harsh environmental conditions. In the event that a product is found to be defective within the warranty period following a thorough inspection, Kleinn Automotive Accessories reserves the right to either repair or replace the defective item at no additional charge to the purchaser. It is our goal to ensure that our products meet the high standards that our customers expect, but we also want to clarify that Kleinn is not responsible for covering any costs related to the installation of our products, nor are we liable for any loss or damage that may occur as a result of the repair or replacement process of any product under warranty.

Extended Two-Year Warranty for Select Products:

Understanding the specific needs of our customers and the demands placed on certain products, Kleinn Automotive Accessories is pleased to offer an exclusive extended two-year warranty for our 6450/6650 Compressors and 730 Horns. This special warranty extension reflects our confidence in these products’ durability and performance. Eligible products under this extended warranty will enjoy all the benefits of our standard one-year warranty with an additional year of protection, totaling two years from the date of purchase. This extended warranty coverage ensures that these specific models, recognized for their robustness and reliability, receive the extra assurance customers desire for these critical components.

Detailed Warranty Return Procedure:

Should you need to initiate a return under the warranty, we have a straightforward process designed to make it as convenient as possible for our valued customers. To start, you will need to email a copy of your sales receipt, which must be dated within the past year for standard warranty claims or within the past two years for claims under the extended warranty for the 6450 Compressors and 730 Horns. This email should be directed to our Warranty Manager and include your full name, email address, telephone number, and a concise description of the problem you are experiencing.

Upon receipt of your email, a dedicated representative from Kleinn Automotive Accessories will reach out to you directly. Our first step will always be to attempt to resolve the issue through technical support, aiming to provide a quick and effective solution. If the problem cannot be addressed remotely, our representative will issue a Return Authorization number. This number is crucial as it will identify your return throughout the inspection process. You are then required to send the product back to Kleinn Automotive Accessories for a comprehensive physical inspection.

Upon inspection, if the product is determined to be defective due to issues in workmanship or materials, Kleinn will undertake to either repair or replace the product at our discretion. We are committed to ensuring that our customers receive products that meet our high-quality standards, and we will make every effort to resolve warranty claims to your satisfaction. However, if the inspection reveals that the product does not have a material defect, we will return the unit to the customer. In such cases, the shipping costs for the return will be the responsibility of the customer.

Kleinn Automotive Accessories
4045 N. Highway Drive, Tucson, AZ 85705
Tel (520) 579-1531

What's the returns policy?

How To Return An Item

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.

Return Non-Exceptions

Merchandise that has been worn, used, or altered will not be accepted for return or exchange.

Restocking Fee

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.