I had a spare set of hella super tones from when I had them on my WRX... I since bought new ones for my STi, thinking these were bad, when in reality it was the relay that was bad...
Re-painted the grills bright red, and installed them on the truck. Now I have the two stock horns and the two front facing supertones.... it's LOUD AF!
I'll get better pictures, these are ******.
Really simple to wire up, incase anyone needs the info or it helps someone:
Relay:
Pin 30: + battery
Pin 86: blue signal wire of exsiting horn wire (There was black and blue wires)
Pin 85: Ground
Pin 87: + wire going to horns.
(Then just ground each horn to the body/frame/metal on metal..etc.)
Works with my keyless entry/panic and pressing the horn switch.
-Nigel