well i really wanted to run train horn setup, but im alright with the 2 pairs of hella super tones right now. its enough, but not train horn loud.
Are those pretty much plug n play or are there mods to do?
I install a set of Hella Super tones on every single car I buy with a weak horn.
On the 4Runner it was the easiest thing to install since you have such good access and I didn't have to drill any holes or do any modification to mount them. Just buy them, get a couple wires, heat shrink, spade connectors, a wire stripper, and you're done.
https://www.amazon.com/HELLA-003399803-Supertone-High-Tone/dp/B0030YWM0Y