12v Dual tone air horn install??

[bwizz]

I've just come back down the A30 after a  trip to mothers . Climbing one of the long drags in Devon in my old astra "with said air horns"  a dozy driver would not pull over after her overtake, I tried the usual polite headlight flash to no avail, Then waching the reaction after a 10second blast with the air horns was priceless The horns are worth every penny for the fun I have had with them , on bikes and car