# Kleinn HK9 Complete Set of Fittings

The Kleinn FIT9-SLIM installation kit contains all the essential air line fittings utilized in an HK9-SLIMLINE Problaster Horn Kit, providing a comprehensive hardware solution for a clean setup. This premium kit includes high-quality 1/4" NPT fittings such as a P/N 2151 145 PSI pressure switch, a P/N 52175 175 PSI safety valve, a P/N 52835 drain cock, a P/N 51238 compression fitting, and a P/N 50040 hex plug. For a complete installation, the package also comes equipped with a P/N 318-BK momentary push button horn switch and a vial of high-performance Juice-1 Thread Sealant to ensure entirely leak-free connections throughout your air system, making it the ultimate all-in-one upgrade to ensure your horn system operates at peak performance and reliability.

-   318-BK momentary push button
-   52175 175 PSI safety valve
-   51238 compression fitting
-   Juice-1 Thread Sealant
-   52835 drain cock
-   50040 hex plug
-   2151 145 PSI

## Details

- **Price:** 138.59 CAD
- **Vendor:** Kleinn Air Horns
- **Type:** Fittings

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 138.59 CAD | In stock |

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/kleinn-hk9-complete-set-of-fittings)
> Updated: 2026-08-31