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not into the back box, int to the tip of the exhaust. needs bol weleded in to wind spark plug into, although i knwo people who just drilled hoel and woudl sparkplug staright into it and it seems to hold!
the wiring is very simple, 3 wires earth, and one to each side of coil. then ht lead from coil to sparkplug.
dont kwo how well it woudl work on normal bravo/a's! woudl definately need to remove cat.
you can wire it to cut the ignition coil, but i didnt do that on mine as sounded a bit dodgy.
its just flick a switch to operate