Wimpy Stock horn?

The nautilus takes quite a few amps so it should be fed from a fuzed connection to the battery. The regular horn wiring can be used to enable the included relay. This mod is *very* popular with bike groups. Here is one of many how-tos:

http://www.nathanielsalzman.com/scooters/diy-stebel-nautilus-air-horn/

 

so looking at this and hating my girl horn i had an idea let me know if there is anything that wouldnt work and if you think this is gay lol.
so i saw the stebel air horn and thought it was cool so maybe hook it up to this or something similar

 

Does anything beefier than the stock single horn need a relay larger than the stocker?

 

Assuming this is a shifter, I think it would slow reaction time when needed most. My horn sounds loud enough to be effective, but if I ever upgrade, I'll use the stock horn actuator on the steering wheel.

Safety first.

 

I have these on my TACO now and they are fairly effective. I could fart louder than the stock horn I had from the factory. Thank god it finally quit on me....(My next horn will be an electric train horn--when I honk at someone I want them to know!!!)

 

Are they electric or pressure driven?