Kleinn Chrome Roof Mount Dual Horn/ 13.5In/11.5In - Chrome-Plated Spun Copper - 401

WHY CHOOSE THE MODEL 401 ROOF-MOUNT HORNS?

• Sleek Underside Inlet: Conceals your structural airline plumbing completely out of sight beneath the roofline to keep a premium, factory-clear architectural appearance. The horns accept a 1/4" outer diameter airline sold separately (KL 25014-1 12' & KL 25014-2 26').
• Premium Commercial Resilience: Heavy-duty chrome-plated stainless steel construction guarantees mirror-finish longevity that easily survives salt spray, extreme crosswinds, and severe highway vibrations.
• Flexible Actuation Infrastructure: Engineered to accept either manual lanyard cord valves or electronic push-button 12V solenoids to easily fit your vintage or high-tech cabin layouts.

THE VERDICT: The definitive jump into authentic semi-truck acoustics. The Model 401 delivers genuine over-the-road authority and massive, multi-tonal projection for heavy-duty commercial haulers, custom service rigs, and overland platforms alike.

WHAT'S IN THE BOX?

• Model 401: Dual Chrome Roof Mount Air Horn Set
• Pneumatic hardware: 1/4" Compression Fitting (Underside 1/4" OD Airline Entry)
  
• Mounting Hardware: Nuts, Bolts, Washers, and pre-fit mounting pad.

⚠️ 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 LINK 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)