Goose's 1994 Ford Bronco Centurion Train Horn Install

2024 GMC Sierra 2500HD AT4

Stealth Spare Tire Delete Kit

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Greg & Tammy H. just leveled up their 2024 GMC Sierra 2500HD AT4 with our Stealth Spare Tire Delete Kit. This powerhouse setup replaces the factory spare tire with a hidden train horn system, giving their truck a clean, aggressive look while keeping everything tucked out of sight.

The Stealth kit mounts Shocker XL train horns and a 5-gallon 8-port air tank in the spare tire location, pairing them with a stealth black compressor and 150 PSI air system. The install went smoothly and now their Sierra is ready for the road – stealthy, functional, and turning heads everywhere it goes.

With 10–12 seconds of honk time and an average 2-minute refill from 0 to 150 PSI, the Stealth Spare Tire Delete Kit delivers serious performance on a heavy-duty platform like the 2500HD AT4. Greg & Tammy also added a HornBlasters Tire Inflation Kit, giving their Sierra practical onboard air for airing up tires in addition to the horn system.

Big thanks to Greg & Tammy for trusting HornBlasters to take their rig to the next level. Their 2024 GMC Sierra 2500HD AT4 now combines hidden train horn power with real-world utility, all built into the space that used to hold the spare.

Feature Highlights

Stealth Spare Tire Delete Kit replaces the factory spare tire with a complete hidden Shocker XL train horn system
Includes four-bell Shocker XL train horns, 5-gallon 8-port air tank, stealth black compressor, valve, gauge, and wiring
Operates at 150 PSI with 110 PSI restart pressure, providing 10–12 seconds of honk time with an average 2-minute refill
Spare tire location install keeps the system out of sight while freeing up bed and frame space
Paired with the HornBlasters Tire Inflation Kit to add practical onboard air for tire inflation and roadside use

STEALTH TRAIN HORN POWER FOR YOUR 2500HD

The Stealth Spare Tire Delete Kit gives your GMC Sierra 2500HD the same hidden train horn setup that Greg & Tammy now enjoy. With Shocker XL horns, a 5-gallon air system, and the ability to add a HornBlasters Tire Inflation Kit, this upgrade delivers both sound and utility. Install a Stealth kit on your truck and keep the power tucked away where only you know it’s there.

UP TO 1500% LOUDER

UNLIMITED HONKING

ZERO
DELAY

CAPABLE ONBOARD AIR SYSTEM

HornBlasters Shocker S6 544K Nightmare Edition Train Horn Kit

PRODUCT

PRICE

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SPECIFICATIONS

Part Number	HK-STEALTH
Operating Pressure	150 PSI
Restart Pressure	110 PSI
Voltage	12-Volt DC
Max Amp Draw	20-22 Amps
Horn	Shocker 4 train horn kit
Horn Measurements	№ 1 19.50″ (495.30 mm) № 2 16.25″ (412.75 mm) № 3 14.75″ (374.65 mm) № 4 12.75″ (323.85 mm)

Horn Material	High-impact fiberglass reinforced ABS
Air Tank	HornAir 2-gallon 6 port air tank
Average Fill Time	60-70 seconds
Air Flow	1.41 CFM
Assembled Length	27" (685.8 mm)
Assembled Width	21" (533.4 mm)
Assembled Height	8" (203.2 mm)
Assembled Weight	50 lbs

FILL RATES

2.0 GALLON TANK	FILL RATE
0 to 150 PSI	3 min. 59 sec. (± 10 sec.)
110 to 150 PSI	1min. 33 sec. (± 05 sec.)

Frequently Asked Questions

The Stealth Spare Tire Delete Kit includes Shocker XL train horns, a 5-gallon 8-port air tank, stealth black air compressor, 1/2\" Black Widow electric air valve, 200 PSI liquid-filled gauge, hoses and fittings, complete wiring kit with relay and fuses, mounting hardware, and detailed instructions. It is a full train horn and air system built to mount in the factory spare tire location.

With a 5-gallon tank operating at 150 PSI, the Stealth kit provides roughly 10–12 seconds of continuous honk time. The system refills from 110 to 150 PSI in about 2 minutes on average, so they have plenty of blast time and reasonable recovery for regular use.

Yes, the Stealth Spare Tire Delete Kit is designed for modern full-size pickups and fits trucks like the 2024 GMC Sierra 2500HD AT4 that use an under-bed spare tire. The assembled bracket measures about 27\" L × 21\" W × 12\" H and weighs around 57 lb, so as long as your truck uses a compatible spare tire hoist style, it is a strong match.

The HornBlasters Tire Inflation Kit connects to the Stealth kit’s onboard air system, giving Greg & Tammy an air hose and fittings to inflate tires or handle light air tasks. It uses the same 5-gallon tank and compressor that power the Shocker XL horns, adding extra value and utility to the hidden train horn install.

The Stealth Spare Tire Delete Kit runs on 12-Volt DC power with a maximum draw of about 25 amps from the compressor. The kit includes the wiring, relay, and fusing needed, but the truck’s charging system should be in good condition to handle the compressor load. Heavy-duty trucks like the 2024 Sierra 2500HD AT4 typically have no problem supporting this type of onboard air system.

SHARE YOUR HORNBLASTERS SETUP

Have a Stealth Spare Tire Delete Kit or onboard air system on your truck? We’d love to see it. Submit photos and details of your setup for a chance to be featured in our install gallery and help other HD truck owners plan their own hidden train horn upgrade.

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