Pipe noise is behind you. This one will wake up most anything. 130DB.
http://www.aerostich.com/ear-cannon-air-horn.html

 

I looked around a bit, it 'might' fit back there but, the looks of it dont bother me much, but again I'm not 100% sold on that spot its just really easy to put it there. But hell yeah its loud, I'm kinda of an a$$hole with it, scaring little kids and such...

 

See the problem I had with this style, is they all sound like high pitched euro cars/scooters. To me I can't even stand the way it sounds, despite its loudness. Hence why I went with something a bit more boomy.

 

Dude ! That pipe sounds farging great. The horn is crazy loud, but a little big.

 

I disliked the HD stock horn so much that after it failed once in three tries, I replaced it about 2 years ago (right after I bought the bike) with the ProPad Mini-Beast 4 airhorn. Easy install: comes with a power wire with fuse holder that you route from stock location to battery, then install horn (fully self-contained in its own enclosure) at the stock location using the stock (command) wires. Took maybe 15 minutes. Good support, too: fuse holder had a slight crack in it when I opened the package, and when I called, they shipped me free of charge a replacement of the entire holder, fuse & wire which I got the next day. And I didn't have to return the bad one (but I did: I'm funny that way.)

It is LOUD. Manufacturer quotes 128 db but it is as loud as most big rig trucks. I could give a number of stories where I really got cagers to snap to attention when I needed it, although if you rely on it thinking it will get you out of a real jam, using a horn may be too late! The ProPad quotes $190 for the Mini-Beast 4 in black, +$15 for chrome. Pricey.

Comes in black or chrome. I chose the "96-type" chrome cover since I'm a nut for balanced things (the stock 103 air cleaner cover bugs me but I haven't found another I really like yet either.) I got it for $140 on eBay, but prices now range up to $160 or $170, but keep an eye out and you'll find a price near what I bought it for. Good luck!

(One story that has to be told: coming back from Muskegon Bike Time on I-96 last year, I came upon a commercial passenger bus rolling down the highway with one of his luggage doors flapping in the wind...and encroaching in my lane as I began to pass. We were both going 70, I waved at him as I pulled alongside. He didn't see me. I unleashed the Mini-Beast: he immediately looked, I waved my arm like the flapping door, he looked back and immediately waved "Thanks", and pulled over. Score one for the Mini-Beast!)

 

That pretty close to what I yelled when a little old lady pulled out in front of me last month! Worked pretty good, got her to at least turn her head and look at me all wide eyed. Guess im pretty loud when I wanna be!

 

Since you like the stock Harley horn cover, you might try this method:

https://www.hdforums.com/forum/touri...ment-horn.html

 

I love my Mini beast Plenty loud, looks great stops a cager in it's tracks. There ya go, problem solved:icon

 

That Fiamm Highway Blaster is what it switched to.
I picked it up at Advance Auto & the install was easy.
TheGrandPoohBah is right on; the sound is “About the same but a lot louder “ than stock.

 

WTG, DesertDyna! Thanks for the link! This is exactly what I am looking for, a loud horn that will fit under the cowbell! I spent hours searching this forum using the forum search and google and I did not find this one.

Horn is on order and I will let ya'll know when I get it in and installed.