You want a real loud horn? www.hornblasters.com It will be loud, but be prepared to pay for it.

 

well a cheap air horn is EASY!!!!!!! its simply power and ground and depends which way your stock horn is powered. with either power or ground triggered.. then the cheap air horns just have a simple hose from the little compressor to the horn or horns. VERY EASY!!!!! no write up needed for that.LOL

i hooked up a chevy truck horn onto my old 86crx tho it was ground triggered at the horn so i had to do a bit of relay work but was still preaty easy!
i just hate these crapy honda horns.LOL i mean YA the car is small and everything BUT come on put a manly horn on the car.LOL