Although the Soundbomb looks very similar to the Nautilus, the construction appears to have more plastic than the Nautilus. But, so far it has proven to be much more reliable than the Nautilus in our experience. In other words, it works. Twisted Throttle also sells a wiring harness for it and various length/configuration coated steel attachment parts. I acquired all the kit I needed from TT, and the install went smoothly.

But a webBikeWorld visitor who read the instructions more carefully than us (!) wrote to let us know we made a mistake.Twisted Throttle said the horn was designed to be more reliable than the Stebel version, while still providing a loud air horn sound. For best results, the Denali horn should really be mounted so that the dual trumpets point forward, not to the side. This complicates the process of finding a suitable mounting position, because it means the widest part of the horn must face forward.

When I opened up the fairing, I saw that the tech connected the horn directly to the OEM horn wiring. When I installed the wiring kit, voila! It worked like a charm. So much for professional installation! Some motorcycle owners have opted for the huge Stebel Nautilus Max (review) or more likely, the Stebel Nautilus Compact (review) as their replacement horn choice. The horn won’t fit behind the exhaust and you don’t want to get these plastic horns near the exhaust anyway (as we learned to our chagrin).

UPDATE (August 2015): We initially mounted the horn shown in the photo at the beginning of this review and with the aluminum bar oriented as shown in the photos above. There’s nothing like going through all the trouble of mounting a big Nautilus — no easy task — and having it fail before you get the bike out of the garage. Oh well… Some motorcycles horn circuits are not capable of powering this 5 amp horn. If your horn circuits' max amperage is less than 5 amps, or if you are unsure, simply add our plug-n-play harness to bypass the horn circuit and draw power directly from your battery. Also, add our standard relay as this is not included with the horn harnesses. Product Specs A high-value alternative, one that’s really handy when space is absolutely at a premium, is the DENALI SoundBomb Mini Low-Tone Horn. Far more powerful than horns on most powersports vehicles, the SoundBomb Mini sill puts out 113 decibels of attention-getting sound but fits into a space less than 3.5 inches square and 2.5 inches deep. Moreover, the Mini is quite power efficient, meaning that many vehicles can handle the needed 5-amp load without needing an external power relay. And if that’s not the case for your application, a Plug&Play harness is also available.