Warranty
The Shocker XL train horns are backed by our lifetime manufacturer’s defect warranty. Every other component in the kit is backed by our 2-year manufacturer’s defect warranty.

Unleash the thrilling power of the railroad with the compact design of the Conductor's Special 127H train horn kit. Tailored for those with limited space but refuse to compromise on performance, this kit is an acoustic marvel. The included Shocker XL train horn replicates the resonance of authentic locomotive horns, all while ensuring installation remains a breeze even in smaller spaces.
Detaching the compressor from the tank will void your warranty on this kit. If you need a solution where the compressor is detached, please look at our 232 and higher models.
Please note: The 6 horn upgrade kit does NOT include the extension brackets to connect to our Shocker XL horn mount.
Enhance your vehicle's presence on the road with the HornBlasters Conductor's Special 228H train horn kit. Armed with the Shocker XL train horns, this compact kit is for those who don't want to compromise on loudness when space and budget are at a premium. With everything included from start to finish and the pre-assembled and pre-wired air source unit, this kit will ensure you're up and honking in no time!
Detaching the compressor from the tank will void your warranty on this kit. If you need a solution where the compressor is detached, please look at our 232 and higher models.
Please note: The 6 horn upgrade kit does NOT include the extension brackets to connect to our Shocker XL horn mount.
Dive into an authentic locomotive experience with our Conductor’s Special 232 train horn kit. Tailored for those with space constraints but unwilling to compromise on power, this versatile kit has found its home in everything from nimble UTVs to commanding big rigs. Harness the roar of our signature Shocker XL train horns and benefit from a comprehensive kit that's designed for hassle-free installation.
Please note: The 6 horn upgrade kit does NOT include the extension brackets to connect to our STDK bracket or Shocker XL horn mount.
For the audacious road enthusiast, the Conductor's Special 244 Nightmare Edition Train Horn Kit is more than a mere accessory; it's a symphony of engineering brilliance. Marrying the relentless performance of our constant-duty 1NM air compressor with the thunderous cadence of our Shocker XL train horns, this kit stands as a beacon of unparalleled power. Equipped with a 2-gallon air tank, this kit ensures each honk is felt, providing 3-5 seconds of honk time that underscores your presence on the open road.
Please note: The 6 horn upgrade kit does NOT include the extension brackets to connect to our STDK bracket or Shocker XL horn mount.
Embrace unparalleled dominance on the road with the HornBlasters Conductor’s Special 544 Nightmare Edition train horn kit. At its core, the legendary Shocker XL train horns resonate with unmatched power, accompanied by the impressive capacity of the 5-gallon air tank. Driven by the relentless HornBlasters HB-1NM compressor, this kit is more than a statement; it's a testament to outstanding craftsmanship and performance.
Please note: The 6 horn upgrade kit does NOT include the extension brackets to connect to our STDK bracket or Shocker XL horn mount.
Elevate your presence on the road with the Conductor's Special 844 Nightmare Edition Train Horn Kit, a masterclass in design and functionality. Meticulously crafted to deliver power and performance beyond imagination, this kit stands as a testament to what can be achieved.
The roaring notes of the Shocker XL Train Horns resonate with the authentic sound of locomotives, while the massive 8-gallon air tank ensures uninterrupted operation. Whether it's the deep, harmonious chords of the horns or the reliable support for your air tools, the 844K Onboard Air System offers it all with uncompromised quality.
Four wide-flare bells that mount individually, so they can be spread out wherever there is room. The deep, layered tone people turn around for, not an electronic imitation.
Every kit ships with its own compressor and tank. It fills itself between honks, and the same air supply can top off tires or run small air tools.
Air line, wiring kit with fuses, fittings, mounting hardware, the electric air valve, an air line cutter, instructions, and earplugs.
One recording of the Shocker XL at full pressure. No editing.
Phone speakers undersell it. Earplugs ship in the box for a reason.
Same four-trumpet Shocker XL in every kit, and all six air up tires and run air tools. What changes is how long you can honk, how fast it refills, and how hard the compressor can keep working.
| System | Honk | Tank | Refill | Duty cycle | Price |
|---|---|---|---|---|---|
| 127HPre-assembled | 2-3 s | 1.5 gal | 0:35 | 25% | |
| 228HPre-assembled | 3-5 s | 2.0 gal | 0:55 | 30% | |
| 232Separate tank | 3-5 s | 2 gal | 1:33 | 100% | |
| 244KSeparate tank | 3-5 s | 2 gal | 0:35 | 100% | |
| 544KSeparate tank | 10-12 s | 5 gal | 2:00 | 100% | |
| 844KSeparate tank, 2 pumps | 18-20 s | 8 gal | 2:26 | 100% | $ 20,889.00 |
Duty cycle is about heat, not a timer. The compressor runs whenever it needs to. Work it hard enough and it gets hot, and a thermal overload switch shuts it off until it cools.
A 25 or 30 percent compressor reaches that point sooner, so a long job can pause partway through. A 100 percent compressor keeps going much longer before heat stops it, which is what matters if you are airing up a set of tires or running an air tool.
On the 127H and 228H the compressor comes pre-mounted to the tank as one assembly. That is the simplest install we sell and the lowest price. Taking it apart voids the warranty.
From the 232 up, the tank and the compressor are separate pieces you can mount apart to fit the space you have, and the compressor itself is heavier duty. That is why the 232 costs more than the 228H, even though the two hold the same air and honk just as long.
Stealth Black disappears under the truck. White shows the horns off. Same four trumpets, same air system, same sound.
| Horn | |
| Model | Shocker XL |
| Material | Fiberglass reinforced ABS |
| Trumpets | 19.5 · 16.25 · 14.75 · 12.75″ |
| Bell flare | 5″ |
| Voltage | 12-Volt DC |
| Air source | |
| Part number | HK-S4-127H |
| Air source unit | HornBlasters 127H air source unit |
| Build | Pre-assembled |
| Dimensions | Air source length 15.2″ (386.08 mm) |
| Operating pressure | 120 PSI |
| Restart pressure | 90 PSI |
| Duty cycle | 25% at 100 PSI |
| Max amperage | 18 A |
| Fill rate, at 13.8 volts | |
| 0 to 120 PSI | 2 min. 10 sec. (±10 sec.) |
| 90 to 120 PSI | 35 sec. (±5 sec.) |
| Fitment | |
| Vehicles | Trucks, SUVs, Cars, RVs |
| Airs up tires and runs air tools | Yes |
| Warranty | Lifetime on the horns, 2 years on the rest |
| Horn | |
| Model | Shocker XL |
| Material | Fiberglass reinforced ABS |
| Trumpets | 19.5 · 16.25 · 14.75 · 12.75″ |
| Bell flare | 5″ |
| Voltage | 12-Volt DC |
| Air source | |
| Part number | HK-S4-228H |
| Air source unit | HornBlasters 228H air source unit |
| Build | Pre-assembled |
| Dimensions | Air source length 19″ (482.6 mm) |
| Operating pressure | 150 PSI |
| Restart pressure | 110 PSI |
| Duty cycle | 30% at 100 PSI |
| Max amperage | 25 A |
| Fill rate, at 13.8 volts | |
| 0 to 145 PSI | 3 min. 5 sec. (±10 sec.) |
| 110 to 145 PSI | 55 sec. (±5 sec.) |
| Fitment | |
| Vehicles | Trucks, SUVs, Cars, RVs |
| Airs up tires and runs air tools | Yes |
| Warranty | Lifetime on the horns, 2 years on the rest |
| Horn | |
| Model | Shocker XL |
| Material | Fiberglass reinforced ABS |
| Trumpets | 19.5 · 16.25 · 14.75 · 12.75″ |
| Bell flare | 5″ |
| Voltage | 12-Volt DC |
| Air source | |
| Part number | HK-S4-232 |
| Air tank | HornAir 2-gallon 6 port tank with HB 3Q compressor |
| Build | Separate tank |
| Dimensions | Tank length 17″ (431.8 mm) |
| Operating pressure | 150 PSI |
| Restart pressure | 110 PSI |
| Duty cycle | 100% at 100 PSI |
| Max amperage | 20 A |
| Fill rate, at 13.8 volts | |
| 0 to 150 PSI | 3 min. 59 sec. (±10 sec.) |
| 110 to 150 PSI | 1 min. 33 sec. (±5 sec.) |
| Fitment | |
| Vehicles | Trucks, SUVs, Cars, RVs |
| Airs up tires and runs air tools | Yes |
| Warranty | Lifetime on the horns, 2 years on the rest |
| Horn | |
| Model | Shocker XL |
| Material | Fiberglass reinforced ABS |
| Trumpets | 19.5 · 16.25 · 14.75 · 12.75″ |
| Bell flare | 5″ |
| Voltage | 12-Volt DC |
| Air source | |
| Part number | HK-S4-244K |
| Air tank | HornAir 2-gallon 6 port tank with 1NM compressor |
| Build | Separate tank |
| Dimensions | Tank length 17″ (431.8 mm) |
| Operating pressure | 150 PSI |
| Restart pressure | 110 PSI |
| Duty cycle | 100% at 100 PSI |
| Max amperage | 25 A |
| Fill rate, at 13.8 volts | |
| 0 to 150 PSI | 2 min. (±10 sec.) |
| 110 to 150 PSI | 35 sec. (±5 sec.) |
| Fitment | |
| Vehicles | Trucks, SUVs, Cars, RVs |
| Airs up tires and runs air tools | Yes |
| Warranty | Lifetime on the horns, 2 years on the rest |
| Horn | |
| Model | Shocker XL |
| Material | Fiberglass reinforced ABS |
| Trumpets | 19.5 · 16.25 · 14.75 · 12.75″ |
| Bell flare | 5″ |
| Voltage | 12-Volt DC |
| Air source | |
| Part number | HK-S4-544K |
| Air tank | HornAir 5-gallon 8 port tank with 1NM compressor |
| Build | Separate tank |
| Dimensions | Tank length 20.5″ (520.7 mm) |
| Operating pressure | 150 PSI |
| Restart pressure | 110 PSI |
| Duty cycle | 100% at 100 PSI |
| Max amperage | 25 A |
| Fill rate, at 13.8 volts | |
| 0 to 150 PSI | 6 min. 45 sec. (±10 sec.) |
| 110 to 150 PSI | 2 min. (±5 sec.) |
| Fitment | |
| Vehicles | Trucks, SUVs, Cars, RVs |
| Airs up tires and runs air tools | Yes |
| Warranty | Lifetime on the horns, 2 years on the rest |
| Horn | |
| Model | Shocker XL |
| Material | Fiberglass reinforced ABS |
| Trumpets | 19.5 · 16.25 · 14.75 · 12.75″ |
| Bell flare | 5″ |
| Voltage | 12-Volt DC |
| Air source | |
| Part number | HK-S4-844K |
| Air tank | HornAir 8-gallon 8 port tank with dual 1NM compressors |
| Build | Separate tank, 2 pumps |
| Dimensions | Tank length 32.5″ (825.5 mm), 10.5″ diameter, 32 lb |
| Operating pressure | 150 PSI |
| Restart pressure | 110 PSI |
| Duty cycle | 100% at 100 PSI |
| Max amperage | 25 A |
| Fill rate, at 13.8 volts | |
| 0 to 150 PSI | 7 min. 26 sec. (calculated) |
| 110 to 150 PSI | 2 min. 26 sec. (calculated) |
| Fitment | |
| Vehicles | Trucks, SUVs, Cars, RVs |
| Airs up tires and runs air tools | Yes |
| Warranty | Lifetime on the horns, 2 years on the rest |
HornBlasters does not publish fill figures for the 8-gallon tank. These are calculated from the measured 5-gallon dual-compressor times, scaled by volume.
Trucks, cars, semis. This is the kit we recommend most for cars, because all of the components can be spread out and mounted individually: horns in the front or rear bumper, behind the grille, or one in each wheel well, with the air system in the cargo area or trunk. Same horn on every one of these. Swipe through.
Hundreds more builds across trucks, vans, semis, boats and more. Search it for your own year, make and model.
The Shocker XL train horns are backed by our lifetime manufacturer’s defect warranty. Every other component in the kit is backed by our 2-year manufacturer’s defect warranty.
We offer a 30-day satisfaction replacement or refund guarantee on all purchases, except where otherwise noted in the product listing.
Merchandise may be returned within 30 days from the shipment arrival date for a refund. A Returned Merchandise Authorization (RMA) number is required for all returns, and a 15% restocking fee may apply. Please report any order discrepancy within 7 days of the invoice date.
Physical damage to any product voids warranty coverage. This includes improper handling and any damage sustained by irregular usage.
On the 127H and 228H kits, detaching the compressor from the tank voids your warranty. If you need a solution where the compressor is detached from the tank, look at our 232 and higher models.
This product can expose you to chemicals including lead, which is 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.
These air horns are extremely loud. Wear hearing protection when testing at close range, never honk directly next to a person or inside an enclosed space, know your local regulations, and use the horns responsibly.
The Conductor’s Special ships complete with detailed instructions, and the horns carry a lifetime defect warranty, the rest of the kit two years, and every order a 30-day money-back guarantee.