Model 412: Rectangular Roof Mount 25" Air Horn - Chrome
BIG-RIG AUTHORITY
Bring the unmistakable thunder of a Mack or Peterbilt to your vehicle. Whether you’re starting a fresh build or upgrading your current setup, the Kleinn Model 412 delivers a deep, iconic semi-truck roar that demands immediate respect. Precision-engineered for high-pressure performance, this horn thrives between 120–175 PSI to ensure maximum acoustic impact every time you hit the valve.
SLEEK, HIDDEN AIRLINE DESIGN
The Model 412 makes a statement with its massive 25” wide bell rectangular trumpet yet maintains a streamlined profile. Featuring a clever underside air inlet, this design eliminates exposed tubing on your roof for a seamless, factory-professional finish. Whether you prefer the classic feel of a manual pull-valve or the modern convenience of a 12-volt solenoid, the 412 is built for versatile, high-output integration.
WHY CHOOSE THE MODEL 412 ROOF-MOUNT HORN?
- Massive Rectangular Flare: Showcases an extra-long 25" single rectangular wide-bell trumpet profile to command attention with authentic big-rig aesthetics and pitch depth.
- Concealed Underside Inlet: Routes plumbing connections completely inside the chassis roof, maintaining a sleek roofline free of unsightly exposed hoses or hardlines.
- Premium Polished Build: Built with heavy-duty stainless steel base elements and finished with a brilliant chrome plating for superior resistance against road salt, wind, and severe vibration.
THE VERDICT: The ultimate single rectangular horn layout for pure commercial character. The Model 412 perfectly delivers the low-frequency acoustic authority and heavy-duty look required to complete premium commercial trucks, work rigs, and specialized service builds.
WHAT'S INCLUDED?
- Model 412: Single Rectangular Roof-Mount 25" Air Horn
- Pneumatic hardware:1/4" Compression Fitting (Underside 1/4" OD Airline Entry)
- Mounting Hardware:Nuts, Bolts, Washers, and Trumpet Mounting ORE.
⚠️ REQUIRED AIR SYSTEM COMPATIBILITY
This air horn requires a compressed air system to operate, with an optimal cut-off pressure between 120–175 PSI. When selecting your setup, remember the Kleinn rule of thumb: higher pressure delivers a louder blast, while a larger tank ensures a longer blast.
COMPATIBLE KLEINN COMPRESSOR SYSTEMS
- 6270: 130 PSI | 25% Duty Cycle | Sealed Air System
- 6275: 150 PSI | 50% Duty Cycle | Sealed Air System
- 6350: 150 PSI | 100% Duty Cycle | Heavy-Duty Onboard Air System
- 6450: 200 PSI | 100% Duty Cycle | Ultra Heavy-Duty Onboard Air System
HORN ACTIVATION OPTIONS
- Manual Pull: Use or (Sold Separately)
- Electric Push-Button: Use or (Sold Separately)
- New Installations: Requires Model 330 Fitting/Mounting Pack (Sold Separately)
MODEL 412 SPECIFICATIONS:
| Model 412 Chrome 25" Air Horn - Rectangular |
| Warranty | 1-Year Warranty |
| Construction | Chrome Plated Stainless Steel |
| Manual Horn Activation (Sold Separately) | P/N 310 chain style or 311 lanyard style |
| 12-Volt Horn Activation (Sold Separately) | P/N- 307 Light-Duty or VX6003 Heavy-Duty |
| Min- Max Pressure | 120 - 175 PSI |
| Output (dB) @ 150 PSI | 150.8dB |
| Dimensions | 25” L x 8.5” W x 4.5” H |
| Minimum Tank Size | 1.5 Gallon |
| Airline Input Size / Fitting Pack Part # | ¼” Airline / 330 roof mount fitting pack |
| Shipping Weight | 8 lbs |
INSTALLATION INSTRUCTION LINKS:
