Model 412: Rectangular Roof Mount 25" Air Horn - Chrome-Plated Stainless Steel - Big Rig Sound

KL 412

$101.95
$101.95 $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 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 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 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:

Model 412: Rectangular Roof Mount 25" Air Horn - 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.

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