SDKIT17-734STL-SOD - SPARE TIRE BOLT-ON TRAIN HORN / ONBOARD AIR KIT - 2017-2026 FORD SUPER DUTY F-250 / F-350 / F-450 - Model 230 Train Horn and Onboard Air System - SOD

  • DIRECT FIT TRAIN HORN AND ONBOARD AIR SYSTEMS FOR 2017 - 2022 FORD SUPER DUTY F - 250 / F - 350 / F - 450 - Totally Bad Ass - Model 730 Train Horn and Onboard Air System - SOD - Kleinn Automotive Accessories - KL SDKIT17 - 734STL - SOD

KL SDKIT17-734STL-SOD

$1,049.96
$1,049.96 $1,399.95

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SDKIT17-734STL-SOD - SPARE TIRE BOLT-ON TRAIN HORN / ONBOARD AIR KIT - 2017-2026 FORD SUPER DUTY F-250 / F-350 / F-450  - Model 230 Train Horn and Onboard Air System - SOD Scratch & Dent [PNXXXX-SOD]

As the name suggests, some cosmetic blemishes that do not effect their performance. SOD-Stock goods have the same 1-year warranty as all other Kleinn products.

Model SDKIT17-734STL: Spare Tire Location Onboard Air & Triple Train Horn System

Built For Modified Rigs. Engineered To Dominate.

Standard horn kits assume your truck is straight off the factory floor—but your build is anything but stock. The Kleinn Automotive Accessories SDKIT17-734STL Steel Triple Train Horns and Onboard Air System is the ultimate, uncompromising solution for Ford Super Duty owners running oversized off-road tires, aggressive aftermarket bumpers, or heavy-duty behind-the-bumper winches.

When modifications take up valuable under-chassis real estate, this premium system saves the day. By utilizing vehicle-specific, powder-coated steel brackets, it intelligently reclaims the factory spare tire cavity to mount the legendary Kleinn 730 Demon™ train horns. The air tank and compressor seamlessly tuck into the surrounding spaces without interfering with your aftermarket upgrades. The result? A completely hidden, high-performance stealth installation that protects your gear from road debris while delivering a true 100% bolt-on fit—meaning absolutely zero cutting, drilling, or welding on your truck's frame.

The Ultimate Onboard Air Command Center

Don't settle for basic horn kits that only make noise—this system transforms your rig into a fully functional, mobile pneumatic powerhouse. At the heart of this heavy-hitting package is a genuine Kleinn heavy-duty, 100% duty-cycle waterproof air compressor paired with a high-capacity air tank.

This creates an incredibly versatile onboard air station engineered for real-world utility. Whether you need to air up large off-road trail tires after a weekend of wheeling, manage air suspension helper bags on the fly, or run pneumatic air tools right from your truck bed, this system delivers instant, reliable high-pressure air on demand. Every chassis-specific bracket, high-pressure airline, and premium hardware component is precision-engineered to tuck completely out of sight, providing clean, stealthy integration while offering maximum defense against harsh road debris, mud, and the elements.

Professional-Grade Durability, Stealth Bolt-on Design

You shouldn't have to sacrifice your truck's clean factory lines to get massive acoustic power. This complete onboard air and train horn system delivers the ultimate combination of high-output performance and a discreet, factory-style aesthetic.

Engineered specifically to survive the most punishing conditions, every component is strategically tucked away to maintain your rig's clean look while keeping the hardware safe from mud, water, and road debris. It is the perfect, low-profile upgrade for serious custom truck builds that demand maximum dependability without the cluttered look of universal kits.

Highlights for SDKIT17-734STL: Ford super-duty 2017-2026

  • Custom Mounting Brackets: Direct-Fit No-Drill Infrastructure. These vehicle-specific, heavy-duty steel mounting plates feature a durable black powder-coated finish and bolt directly into existing factory frame holes, providing a rock-solid, custom-fit foundation engineered specifically for proprietary, genuine Kleinn components.
  • Strategic Multi-Zone Space Allocation: Brackets locate the air tank along the crossmember in front of the spare tire area, tuck the compressor safely on the passenger side inner frame rail, and position the massive horns directly in the empty factory spare tire pocket.
  • Model 730 Demon™ Triple Steel Train Horns: Precision-tuned detachable triple stainless steel trumpets with custom mounting configuration footprint, shipped on flat-rack bar. These horns receive air from a high-flow VX6003 brass solenoid and heavy-duty 1/2" airline to deliver an authentic, window-rattling locomotive roar.
  • Model 6450RC Waterproof Air Compressor: Industry-exclusive fully sealed pump delivering up to 200 PSI with a 100% duty-cycle, engineered to operate flawlessly in harsh, moisture-heavy under-truck environments.
  • Model 6351RT 3-Gallon Air Tank: Specialized heavy-gauge steel multi-port reservoir treated with an internal Cortec anti-corrosion coating to eliminate rust and protect downstream components. 
  • Premium INF-1 Tire Inflation Station: Includes a pro-grade inflation setup featuring a 24' heavy-duty air hose with pre-attached quick-connect couplers, a custom analog glow-gauge inflator, a secure clip-lock chuck, and an integrated pressure-release button.
  • 1302 Quick-Connect Relocation Architecture: Fully equipped with a dedicated bumper/hitch mounting bracket layout, 12 ft of specialized high-pressure airline, and premium adapter fittings designed to position the inflation port cleanly under your bumper or next to your trailer hitch receiver.
  • Installation Pack: 1/2" OD high-pressure airline, automated pressure switch, high-pressure tank fittings, wiring kit, mounting hardware, and horn button. 

For the ultimate locomotive experience, add the Ultra BlastMaster Upgrade Kit. Boost output by 30% with Model 6890 by doubling the airflow using dedicated 1/2" lines and individual high-flow brass solenoids for each train horn.

Train Horn Specifications

Triple Steel Train Horns
Part Number Model (730) “The Demon"
Number of Horns 3 (Flat Rack or Individual Mount)
Warranty 2-Year Warranty
Construction Stainless Steel Trumpets
Brass Solenoid P/N VX6003 (12-Volt)
Max Pressure 200 PSI
Output (dB) 157.8 dB (159.6 dB w/ 6890 Upgrade Kit)
Rack Dimensions 22.5” L x 18.5” W x 7.25” H
Trumpet Lengths 21.75”, 17.75”, 13.5”
Airline Size 1/2" OD Airline

Air Compressor Specifications

Feature Feature Details
Part Number Model 6450RC
Warranty 2-Year Extended (6450RC, 6650RC, & 730)
Max Pressure 200 PSI
Duty Cycle 100% @ 100 PSI (@ 72° F)
Flow Rate @ 0 PSI (13.8 Volts): 2.1 CFM
Compressor Type Waterproof Sealed, Oil-less
Voltage 12-Volt DC
Motor Type Permanent Magnetic Motor
Max Tank Size 7.0 Gallon
Max Amp Draw 23 Amps
Dimensions 11.25” L x 4” W x 6.50” H
Mounting Holes 8.90” L x 3.31” W (5mm Diameter)
Mounting Note Mountable in any position except upside down
Shipping Weight 12 lbs
Pressure Switch P/N 2151 (Works with 52175 Safety Valve)

Air Tank Specifications

Slim Mount Air Tank Model 6351RT
Warranty 1-Year
Tank Capacity 3-Gallon
Construction All Steel Design (Gloss Black Epoxy Finish)
Internal Coating Cortec Internal Anti-Corrosion Coating
Mounting Legs 2 Legs w/ 4 Mounting Points
Air Tank Ports Five - 1/4" NPT Ports & One - 3/8" NPT Ports
Mounting Hardware Fitting Pack - 4 Bolts, Nuts, Washers
Max Pressure 200 PSI
Dimensions 27” L x 6” W x 8” H

Air Tank Fill Rates

Tank Capacity Pressure Range Fill Rate
2.5 Gallon 0 - 150 PSI 2 Min. 54 Sec. (+/- 10 Sec.)
2.5 Gallon 110 - 150 PSI 54 Sec. (+/- 5 Sec.)
5 Gallon 0 - 150 PSI 5 Min. 57 Sec. (+/- 10 Sec.)
5 Gallon 110 - 150 PSI 1 Min. 53 Sec. (+/- 5 Sec.)

Installation Links:

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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