That wimpy factory horn on my FJ has to go. After listing to numerous sound bytes of air horns and others, I recall my mom had a Cadillac that had a great sounding horn. After a little research I found the better sounding Cadillac horns were actually 4 horns - A, C, D & F notes. I just orders a set of used ones off e-bay. Has anyone installed a set on their FJ? If so, where did you mount the horns and relay? Did you bring power to the relay straight from the battery or the fuse block? Any other suggestions?