- +Four-trumpet chord sounds closer to a real locomotive than economy dual/triple horns, per owner reports
- +12V heavy-duty solenoid valve included and preinstalled
- +All-metal chrome-plated construction at an ABS-trumpet price point
- +150 PSI max rating suits semi-truck air systems without a regulator
- +Widely stocked — Speedway Motors, Amazon, eBay, and the truck-parts network all carry it
- −155 dB ±10 dB claim has no test distance and a huge tolerance window
- −Horn only — compressor, tank, line and switch all cost extra
- −Short 6-month warranty versus 1-year+ from kit brands
- −No chord frequency (Hz) data published
- −Owner reports say it needs real tank volume; weak on small compressors
Methodology
This review aggregates publicly available information from manufacturer specifications, retailer listings, and verified user reviews. We do not perform hands-on testing. Last reviewed: August 5, 2026. For this article we pulled data from United Pacific’s official truck-parts store listing, five independent retailer listings (Vehicle Safety Supply, Closer To Wholesale, TruckAC, Muscle Cars & Classics, and Speedway Motors), and owner discussions on Train Horn Forums. Every number below traces to one of the links in the Sources section at the end.
Quick verdict
The United Pacific 46130 is the four-trumpet flagship of the brand’s Standard Series chrome train horns — a horn-only cluster with the 12V solenoid already installed, aimed at drivers who bring their own air. We rate it 3.6/5. The advertised 155 dB ±10 dB figure comes with no published test distance and a tolerance window wide enough to hide two very different horns inside, which costs it points for acoustic honesty. But owner reports consistently praise the authentic, locomotive-like chord these clusters produce once they’re fed real tank volume, and an all-metal chrome quad with the valve included for roughly $165–$195 street is genuinely decent value. Semi drivers with truck air are the natural audience; pickup owners should budget for a full onboard-air system first.
What it is
The 46130 is a set of four chrome-plated trumpets of staggered lengths mounted on a single heavy-duty bracket, with a 12V heavy-duty electric solenoid valve plumbed in at the manifold. It is not a kit: there is no compressor, no tank, no air line, and no switch in the box. United Pacific positions it as the “Standard Duty” (economy) tier of its train-horn line — one step below the Competition Series horns like the 46151 and 46152, and below the heavy-duty 46115 that the brand markets as its loudest horn.
That positioning matters for expectations. Standard Series horns use lighter construction than the Competition units, and the price reflects it. The buyer this makes sense for already has air on the vehicle — a semi tractor with its factory air system, or a pickup running an onboard-air setup for tires and suspension (see our guide to train horn onboard air uses). If you’re starting from zero, read our tankless vs onboard-air explainer before buying a bare horn like this one. More United Pacific coverage lives on our United Pacific reviews hub.
Specifications
| Spec | Value |
|---|---|
| Model | United Pacific 46130 (Speedway Motors part 419105) |
| Trumpets | 4, chrome-plated, single-bracket cluster |
| Advertised sound output | 155 dB ±10 dB (test distance not disclosed) |
| Max air pressure | 150 PSI (one retailer lists 120 PSI — see note below) |
| Valve | 12V heavy-duty electric solenoid, included and preinstalled |
| Construction | Zinc alloy with chrome plating (per retailer listings) |
| Dimensions (approx.) | 15-3/8” L × 12” W × 12-1/2” H |
| Shipping weight | ~15.2 lb |
| Chord frequencies | Not disclosed |
| Air supply | Not included — external onboard air required |
| Warranty | 6 months |
| Street price | ~$163–$192 (list up to ~$210) |
One footnote on that table: TruckAC’s listing says 120 PSI max while United Pacific’s own store copy, Vehicle Safety Supply, Closer To Wholesale, and Muscle Cars & Classics all say 150 PSI; we treat 150 PSI as the correct figure and the 120 as a listing error.
What’s in the box
- Four-trumpet chrome horn cluster, pre-assembled on a single bracket
- 12V heavy-duty electric solenoid valve, preinstalled at the manifold
- Heavy-duty mounting bracket with mounting pad and hardware
What’s not in the box: compressor, air tank, air line, fittings, relay, or activation switch. Plan your supporting parts with our install guide and air line sizing guide before ordering.
Pros
- Four-trumpet chord sounds noticeably closer to a real locomotive than dual- or triple-trumpet economy horns — a consistent theme in owner reports
- 12V solenoid valve included and preinstalled; many bare horn clusters make you source the valve separately
- All-metal, chrome-plated construction at a price point where ABS trumpets are common
- 150 PSI max rating means a semi’s full system pressure works without a regulator
- Wide availability — Speedway Motors, Amazon, eBay, and the truck-stop parts network all stock it
Cons
- 155 dB ±10 dB claim has no published test distance, and a ±10 dB tolerance is enormous — treat it as marketing, not measurement
- Horn only: budget several hundred dollars more for compressor and tank if your vehicle has no onboard air
- 6-month warranty is short next to the 1-year-plus coverage from Kleinn or HornBlasters kits
- No chord frequency (Hz) data published anywhere we could find
- Owner reports say it underwhelms on small pancake compressors — it needs genuine tank volume and pressure to hit its stride
Alternatives
- United Pacific 46129 — the three-trumpet Standard Series sibling: same construction and 150 PSI rating, 145 dB ±10 dB claim, a bit smaller and cheaper. Our full review: United Pacific 46129.
- United Pacific 46151 Competition Series — the step-up three-trumpet horn with heavier-duty build and a 150 dB ±10 dB claim; the better choice if you want United Pacific tone with stouter hardware. Review: United Pacific 46151.
- Vixen Horns VXH4318 — a competing chrome four-trumpet cluster in the same horn-only format and price neighborhood. Review: Vixen Horns VXH4318.
For how trumpet count changes the sound, see single vs dual vs quad trumpet horns.
Install / compatibility notes
The 46130 needs a real air supply. On a semi truck, the usual route is tapping the accessory side of the air system through a pressure protection valve — the horn’s 150 PSI ceiling matches typical truck system pressure, which is exactly the use case in our semi truck train horn guide. On a pickup or SUV, you’ll need an onboard compressor-and-tank setup; most quad-trumpet horns of this size want a 1.5–3 gallon tank and at least 3/8” line to sound right (see what size air line and PSI explained).
Electrically, the included solenoid is a standard 12V unit: run it through a relay with a fused feed rather than switching horn current directly — wiring diagrams are in our relay wiring guide. At roughly 15 inches long, the cluster fits frame rails, under-bed spots, or cab roofs on Class 8 trucks; think through drainage and trumpet orientation with our mounting location guide so the trumpets don’t collect water. And before you install anything this loud, check your state’s rules in our street legality overview.
Sources
- United Pacific — 4 Trumpets Air Powered Chrome Train Horn 46130 (official store) — official listing: 155 dB ±10 dB output, 150 PSI max, 12V heavy-duty electric solenoid included (page is bot-protected; content confirmed via search index and retailer syndication of the official copy)
- Vehicle Safety Supply — United Pacific 46130 — $192.43 price, 15.2 lb shipping weight, 150 PSI max, 15-3/8” × 12” × 12-1/2” dimensions, 6-month warranty, included mounting hardware
- Closer To Wholesale — United Pacific 46130 — $163.24 price, 155 dB ±10 dB, 150 PSI max, 12V solenoid included
- TruckAC — 4 Trumpets Air Powered Chrome Train Horn 46130 — $191.10 price ($210.21 list), zinc alloy with chrome plating, mounting bracket/pad/hardware, outlier 120 PSI figure noted in Specifications
- Muscle Cars & Classics — United Pacific 46130 — CA$341.99 price, 155 dB ±10 dB, 150 PSI max, 6-month warranty, Prop 65 chromium notice
- Speedway Motors — United Pacific 46130, part 419105 — retailer part number and retail availability
- Amazon — United Pacific 46130 listing — retail availability and spec cross-check
- United Pacific FAQ — What is the loudest train horn that United Pacific offers? — backs that United Pacific markets the 46115 as its loudest train horn
- Train Horn Forums — “I still can’t get over how good United Pacific horns sound” — owner impressions of United Pacific horn tone and air-supply sensitivity (user reports)
Train Horn Hub aggregates publicly available data. We do not test products in-house. All trademarks belong to their respective owners.
A solid pick for semi drivers and onboard-air owners who want a full four-trumpet chrome cluster with the solenoid already fitted for under $200 — just read the 155 dB ±10 dB figure as marketing, not measurement.
Frequently asked questions
Quick answers to the questions people ask most about this topic.
- How loud is the United Pacific 46130 really?
- United Pacific advertises 155 dB ±10 dB with no published test distance, so treat it as a manufacturer claim rather than a measured figure. Real-world loudness depends heavily on supply pressure and tank volume; owners report it sounds strongest on full truck air at up to its 150 PSI rating.
- Does the 46130 come with a compressor or air tank?
- No. It is a horn-only cluster with a preinstalled 12V solenoid and mounting hardware. You need an existing onboard air source — a semi's air system or an aftermarket compressor-and-tank setup — to run it.
- What is the difference between the 46130 and the 46129?
- Both are United Pacific Standard Series chrome horns with a 12V solenoid and 150 PSI max rating. The 46130 has four trumpets and a 155 dB ±10 dB claim, while the 46129 has three trumpets, a 145 dB ±10 dB claim, and a slightly smaller, cheaper package.
- Can I run the 46130 on a semi truck's air system?
- Yes. Its 150 PSI max rating matches typical Class 8 system pressure, so the common install is tapping the accessory side of the truck's air system through a pressure protection valve — no regulator needed.
- What warranty does the United Pacific 46130 have?
- Retailer listings show a 6-month manufacturer warranty, which is shorter than the 1-year or longer coverage offered by kit brands like Kleinn and HornBlasters.
