Kleinn HK8 Complete Set of Fittings

Equip your vehicle's onboard air installation with the premium Kleinn FIT89 complete plumbing and fitting kit, engineered as a direct-fit component package for the HK8 and HK9 ProBlaster train horn systems or for universal high-pressure custom configurations. Built for maximum pneumatic reliability, this comprehensive hardware kit includes a complete set of heavy-duty 1/4-inch NPT brass fittings to guarantee a completely leak-free setup under extreme pressure. To streamline your airline routing and ensure safe operation, the high-performance kit comes fully loaded with a part number 2151 145 PSI automatic pressure switch, a part number 52175 175 PSI safety relief valve, a part number 52835 air tank drain valve, a part number 50040 hex plug, and a 51212 straight compression fitting. Designed for a clean, professional finish right out of the box, this ultimate upgrade package also includes a part number 318-BK black momentary horn push-button switch alongside a vial of Kleinn's exclusive Juice-1 liquid thread sealant, giving you everything needed to successfully complete or service your air horn system.

Part Type

Air Horn Fitting

• 50040 Hex Plug
• 51414L Elbow 1/4" Compression fitting
• 52835 Tank Drain Pet-cock butterfly valve
• Juice-1 Thread Sealant
• Model 2151 Pressure Switch
• Model 318BK Horn Push Button
• Model 52175 Safety Valve

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Product Downloads

#	Document Type	Download
1.	Installation Instructions
2.	Illustration Guide

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Reference Information

Fittings, Complete set of fittings for a Kleinn HK8 or HK9 Problaster Horn Kit