Low-angle three-quarter front view Kyle's black 1985 Chevy K20 Deluxe Pickup lifted with raised cowl hood chrome grille and Cooper Discoverer off-road tires on rural gravel HornBlasters Conductor's Special 127H featured customer install gallery photo 1

Truck bed view four black train horn trumpets mounted on silver diamond-plate toolbox against cab Kyle's 1985 Chevy K20 Deluxe Pickup Conductor's Special 127H Train Horn Kit gallery photo 2

Overhead view open diamond-plate toolbox showing four black horn trumpets air tank compressor solenoid and wiring Conductor's Special 127H in Kyle's 1985 Chevy K20 bed gallery photo 3

Overhead close-up HornBlasters air tank with compressor four black horn trumpets air lines and wiring inside diamond-plate toolbox Kyle's 1985 Chevy K20 Conductor's Special 127H gallery photo 4

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Featured Install

Conductor's Special 127H Train Horn Kit

Kyle's 1985 Chevy K20 Deluxe Pickup

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Owner Kyle

Year 1985

Vehicle 1985 Chevy K20 Deluxe Pickup

1985 Chevy K20 Deluxe Pickup Truck owner Kyle C. upgraded his classic square-body build with our HornBlasters Conductor’s Special 127H Train Horn Kit for a massive boost in sound and road presence. Conductor’s Special packages center on the Shocker XL train horn chord, and the 127H air source is a natural fit for vintage full-size trucks that need authentic train horn tone without swallowing the entire frame.

The Conductor’s Special 127H Train Horn Kit was installed in the rear underbody/frame area of Kyle’s 1985 Chevy K20 Deluxe Pickup Truck, giving it a clean hidden setup while still delivering that unmistakable full-size train horn blast. The 127H system is a popular choice for square-body Chevy trucks thanks to its balance of loudness, reliability, and classic onboard air functionality.

Kyle C.’s installation keeps the exterior of the truck looking factory-clean while hiding a serious air horn system underneath, making it a perfect example of how well the Conductor’s Special 127H Train Horn Kit fits vintage Chevy builds. HornBlasters documents part HK-S4-127H, 120 PSI operation with 90 PSI restart, a 1.5-gallon four-port tank, roughly 2–3 seconds of honk time, and about 35 seconds to refill from 90 to 120 PSI on the current product listing.

Still weighing tank size or honk duration for your square-body? Browse the full Conductor’s Special train horn kits collection or use horn kit recommendation before you commit.

Feature Highlights

Conductor’s Special 127H Train Horn Kit (HK-S4-127H) packages Shocker XL locomotive-style tone with the compact HornBlasters 127H air source sized for tighter frame installs
This K20 square-body install: rear underbody/frame mounting for a factory-clean exterior and protected hardware underneath
HornBlasters lists 120 PSI / 90 PSI restart, 1.5-gallon tank, ~2–3 second honk window, and up to 18 amps max draw—plan wiring and fusing for a classic 12-volt truck electrical system
Separate Shocker XL bells route flexibly along frame rails and crossmembers—mirror Kyle’s hidden layout on your own vintage Chevy
Need longer honks or a detached compressor? Compare 228H, 232, and larger kits in the Conductor’s Special train horn kits collection

HornBlasters Shocker S6 544K Nightmare Edition Train Horn Kit

PRODUCT

PRICE

Sold out

UP TO 1500% LOUDER

UNLIMITED HONKING

ZERO
DELAY

CAPABLE ONBOARD AIR SYSTEM

CONDUCTOR’S SPECIAL 127H FOR YOUR SQUARE-BODY CHEVY

The Conductor’s Special 127H Train Horn Kit delivers the same hidden rear-frame discipline and Shocker XL presence Kyle C. showcased on his 1985 Chevy K20 Deluxe—ideal when you want vintage looks with modern train horn authority. Confirm the latest HornBlasters instructions, torque values, and pressure-switch wiring on the product page, then service the 127H air source the way HornBlasters specifies so warranty coverage stays intact.

SPECIFICATIONS

Part Number	HK-S4-127H
Operating Pressure	120 PSI
Restart Pressure	90 PSI
Voltage	12-Volt DC
Horn	Shocker XL train horn
Horn Material	High-impact fiberglass reinforced ABS
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 Flare	5″ (127 mm)

Air Source Unit	HornBlasters 127H air source unit
Air Source Length	15.2″ (386.08 mm)
Air Source Width	5.9″ (149.86 mm)
Air Source Height	12.8″ (325.12 mm)
Air Source Weight	13.75 lb (6.24 Kg)
Air Tank	1.5 Gallon 4 Port Tank
Volume	1.5 gal (6.6 L)
Air Compressor	275C air compressor
Max Amperage	18 amps
Maximum Duty Cycle	25% @ 100 PSI

FILL RATES

1.5 GALLON TANK	FILL RATE
0 to 120 PSI	2 min. 10 sec. (±10 Sec.)
90 to 120 PSI	35 sec. (± 5 Sec.)

Frequently Asked Questions

The Conductor’s Special 127H Train Horn Kit is a complete HornBlasters package: Shocker XL train horns, the pre-plumbed 127H air source unit, electric valve, DOT air line, wiring kit with fuse holder, mounting hardware, and the components listed on the product page for HK-S4-127H (white finish ships as HK-S4W-127H). Kyle C.’s K20 uses that turnkey recipe hidden at the rear frame.

Yes—Kyle’s build shows how rear underbody/frame placement can keep the Conductor’s Special 127H tucked away while still projecting serious tone. Every square-body differs by bed length, lift, exhaust, and prior mods, so map clearance to leaf springs, fuel lines, and spare-tire hardware before you drill. Isolate vibration, protect airlines from road debris, and follow HornBlasters’ instructions for the 127H air source.

HornBlasters lists 120 PSI operating pressure, 90 PSI restart, a 1.5-gallon four-port tank, roughly 2–3 seconds of honk time, about 35 seconds to refill from 90 to 120 PSI, and up to 18 amps max draw for the Conductor’s Special 127H Train Horn Kit. Vintage trucks may need upgraded charging and ground paths—verify your alternator and battery health before you lean on repeated honks.

No. HornBlasters warns that separating the compressor from the tank on the 127H air source voids the warranty. If you need a detached compressor for tighter square-body packaging, their guidance points you toward 232-series and larger Conductor’s packages—see the warning on the Conductor’s Special 127H Train Horn Kit product page.

Start with how much frame space you can hide, how long you want each honk to last, and whether you also need accessory air for tires or tools. The Conductor’s Special 127H is the compact Shocker XL + 127H bundle Kyle chose; 228H and 232 step up tank volume and honk time when you have room. Browse the Conductor’s Special train horn kits collection or use horn kit recommendation when you are stuck between SKUs.

SHARE YOUR HORNBLASTERS SETUP

Running Conductor’s Special, Outlaw, or another HornBlasters kit on your square-body Chevy, GMC, or classic truck? We’d love to see it. Submit photos and details of your installation for a chance to be featured in our install gallery.

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