# Kleinn Chrome Roof Mount Single Horn/ 21.5In - Chrome-Plated Spun Copper

Equip your truck with the Kleinn 411 direct-fit single chrome-plated roof-mount air horn system, featuring a single premium all-metal trumpet measuring 25 inches in length with an oversized bell end to deliver the ultimate big-rig sound. Engineered for universal semi-truck and commercial vehicle applications, this massive, heavy-duty roof-mounted configuration allows you to command the road with a deep, authentic, and deafening locomotive-style blast. Designed for clean external mounting on custom or commercial rigs, this high-performance horn kit requires an onboard pressurized air system and can be operated using a manual hand-pull air valve or an electronic solenoid valve. For a proper, leak-free setup right out of the box, the installation requires a Model 330 Roof Mount Air Horn Fittings Kit, providing the ideal balance of gleaming chrome style and serious acoustic presence that serious custom truck builds count on.

-   330 Fitting Pack required if not replacing an existing roof mount horn
-   Manual Hand Pull Air Valve 310 or 311 / Solenoid Required
-   Chrome-Plated Stainless Steel Construction
-   Dimensions (in): 25 x 6 x 6
-   Output (dB) @ 150 psi 150.1
-   One Trumpet 24" w 1" Base
-   1/4" Airline Input

## Details

- **Price:** 187.22 CAD
- **Vendor:** Kleinn Air Horns
- **Type:** Horns

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 187.22 CAD | In stock |

---

> Source: [Standard Auto Part](https://www.standardautopart.com/products/kleinn-chrome-roof-mount-single-horn-21-5in-chrome-plated-spun-copper)
> Updated: 2026-08-31