Stebel horn
for each
2 flat washers & 1 lock washer that will fit the bolt that comes with horn
3' length of 12 - 14 ga wire for an extension on the fused wire
3' length of black fuel line hose that will fit the air intake adapter that comes with the horn
Soldering iron, solder, flux, shrink wrap or tape
multimeter
the machined screw that held AI unit on the frame
I assume you have the wiring kit that comes with the horn