Model HK4 Chrome Quad Air Horn Kit - NOB (New Open Box) New Open Box The 730 can be upgraded

The 730 can be upgraded by adding an Ultra BlastMaster™ valve upgrade (P/N 6890) – making it the loudest

Custom Mounting Plate: Black-finished faceplate plate naturally absorbs road-induced vibrations while providing a professional

maintaining a sleek roofline free of unsightly exposed hoses or hardlines

or up to 12 amps for heavy-duty 24V commercial vehicle configurations

🔍 Air Horn System Overview

Model HK4 Chrome Quad Air Horn Kit - NOB (New Open Box) New Open Box The 730 can be upgradedModel HK4 Chrome Quad Air Horn Kit New Open Box [PNXXXX NOB] Previously opened boxes that have been reboxed. NOB Stock goods have the same 1 year warranty as all other Kleinn products. ProBlaster HK4 Complete Chrome Compact Quad Air Horn Kit Quad chrome air horn with four tuned trumpets. 13", 11", 8. 5", and 7", also available in black XCR2. 0 Stealth finish (P N HK4 1). More trumpets mean a more full blended tone. The horns are compact enough to fit