The Kleinn ProBlaster Quad Air Horn Kit (HK4 / HK4-1) is designed for drivers who want maximum sound output from a complete, easy-to-install system. It delivers a powerful four-tone blast while maintaining a compact footprint that fits most trucks, SUVs, and Jeeps.
Built with all-metal trumpets in either chrome or black XCR2.0 finishes, this system offers excellent durability and resonance. The quad horn configuration (13", 11", 8.5", and 7") produces a full harmonic tone that is louder and more complex than smaller systems.
Additional features include a 130 PSI sealed compressor, a 1-gallon steel air tank, and a snorkel intake system for cleaner airflow. This setup ensures consistent performance and longer blast duration compared to smaller kits.
Engineered with universal fitment, the HK4 kit can be installed across a wide range of vehicles including trucks, SUVs, Jeeps, and custom builds.
Installation is typically a straightforward bolt-on process with included wiring and hardware, making it suitable for both DIY and professional installs.
Whether you're upgrading for safety, towing awareness, or maximum road presence, this kit delivers the loudest ProBlaster performance available. Now Available at LEER!
Features & Specifications
Product Type: Complete Quad Air Horn Kit
Material: Metal trumpets (chrome or XCR2.0 black) / steel tank
Finish Options: Chrome (HK4) / Black (HK4-1)
Mounting Type: Universal bolt-on
Fitment: Universal
Design: Quad air horn system with onboard air supply
Key Dimensions:
- Trumpets: ~13", 11", 8.5", 7"
Functionality:
- High-decibel 4-tone output (~149–154 dB range)
- Air-powered system with compressor and tank
- Automatic pressure switch (~100–130 PSI range)
Available Options
The Kleinn ProBlaster Quad Air Horn Kit is available in:
Vehicle Fitments:
Universal (fits most trucks, SUVs, Jeeps, and off-road vehicles)
Finish Options:
- Chrome (HK4)
- Black XCR2.0 (HK4-1)
Configurations:
- HK4 – Chrome quad horn kit with polished finish
- HK4-1 – Black quad horn kit with stealth corrosion-resistant coating
Choose HK4 for show-quality chrome styling, or HK4-1 for rugged, low-profile durability.
Why Choose Kleinn ProBlaster Quad Air Horn Kit?
This product is ideal for customers who want the loudest complete system in the ProBlaster lineup.
- Loudest and fullest sound in the HK series
- Longer blast time thanks to larger air tank
- Complete kit simplifies installation
- Durable components built for harsh environments
What’s Included
- Quad air horns (Model 141 series)
- 130 PSI waterproof air compressor (Model 6270RC)
- 1-gallon steel air tank (Model 6270RT)
- Pressure switch, safety valve, and fittings
- Airline tubing and wiring kit
- Horn button
- Installation instructions
Installation Notes
- Universal fitment; mounting required for compressor and tank
- Requires 12V power connection
- Typical install time: 2–4 hours
- Fits behind grille, engine bay, or frame-mounted locations
Warranty Information
Kleinn Warranty
Kleinn products are backed by a limited warranty, covering defects in materials and workmanship.
