I ordered the Denali for my K1300S.
I saw the install video, and also ordered the Hornig bracket. The bracket ended up being a pretty simple L bracket, and was pricey.
However, from the quick install time, it was clear that it worked well. This is sometimes well worth the money, to save the aggravation of trying to Mcgiver something together.
The horn was small enough to fit well, and no doubt it is far louder and more commanding than a stock BMW horn. On the freeways, this is what you need to stay alive!
I would highly recommend: and also, dealing with Sierra was a pleasure. Very professional group. Tom is the man!Rating: [5 of 5 Stars!]