Installation on my 04ft HD Sportster XL1200C couldn't be simpler and it fits under the stock horn next to the crankcase as if it were designed for my bike. I'm actually quite surprised by this $28 thing, which goes with the rest of my chrome better than I expected. Compressor, relay everything fitted together. Strangely enough, the supplied wiring harness turned out to be almost "perfect" for my setup. My kit INCLUDES a neat schematic, but I took a screenshot of the schematic which the seller puts online just in case ;-). To be honest I'm still a little shocked by the ease of installation and the huge EXPLOSION this thing produces. For my fellow bikers who are considering adding a horn (VERY GOOD IDEA) as an extra safety measure, I intend to post a step-by-step instructional video in my follow-up review of this product. I would also recommend taping a small piece of filter material over the compressor's 5/16" air intake to prevent road debris from contaminating the tabs in the tube driver. A little ingenuity and it seems like amazing value. . IF it lasts LOL!. At the moment I really like his look and I hope he won't let me down when I really need him. I kept the original horn just in case ;-)
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