Model 401: Dual Round Roof-Mount Air Horns - Chrome Plated Stainless Steel - Big Rig Sound

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KL 401

Regular price $101.95
Sale price $101.95 Regular price $119.95

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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 401 Dual Round Roof-Mount Dual Air Horns - Chrome

BIG-RIG AUTHORITY

Bring the unmistakable thunder of a Mack or Peterbilt to your Rig. Whether performing a fresh build or upgrading your current roof-mount horns, Model 401 delivers that iconic semi-truck roar that demands immediate respect. Precision-engineered for high-pressure performance, these horns thrive between 120–175 PSI to ensure maximum acoustic impact every time you hit the valve.

SLEEK DESIGN, MASSIVE PRESENCE

Experience a seamless, factory-professional look with the Kleinn 401. Its clever underside air inlet hides all plumbing, providing a clean roofline free of exposed tubing. These chrome-plated stainless-steel trumpets are built for the long haul, offering aerodynamic styling without sacrificing volume. Whether you’re running a classic manual pull-valve or a modern 12-volt solenoid, the 401 is the ultimate choice for versatile, classic Big Rig ROAR!

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 Model 310 or Model 311 (Sold Separately)
  • Electric Push-Button: Use Model 307 or Model VX6003 (Sold Separately)
  • New Installations: Requires Model 330 Fitting/Mounting Pack (Sold Separately)

MODEL 401 SPECIFICATIONS:

Model 401 Chrome Roof Mount Dual Air Horns
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 lt-duty or VX6003 hvy-duty
Min- Max Pressure 120 - 175 PSI
Output (dB) @ 150 PSI 152.1 dB 
Dimensions 15.5” L x 7.5” 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 5 lbs

INSTALLATION INSTRUCTION LINKS:

Model 401: Dual Round Roof-Mount Air Horns - Chrome Plated Stainless Steel - Big Rig Sound

$101.95

Does it come with a warranty?

Kleinn Automotive Accessories Limited Warranty

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.

One-Year Limited Warranty

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.

What Is Not Covered

This warranty does not cover damage or failure resulting from:

  • Improper installation
  • Misuse, abuse, or improper operation
  • Use outside the product's intended application or specifications
  • Modification or alteration of the product
  • Accidents or physical damage
  • Electrical damage
  • Environmental damage or exposure
  • Normal wear and tear

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.

Warranty Claims

To request warranty service, email warranty@kleinn.com with the following information:

  • A copy of your original sales receipt or proof of purchase
  • Your full name
  • Email address
  • Telephone number
  • A brief description of the issue

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.

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.