dont do it, i did it on my golf cart, first i ran propane for my flames and it was a bitch to run the propane "pluming" go the exhauast plus a extra coil, plugs drilled into the the pipe and so on, that was just for a normal think metal piping like a cars, for a banshee you'll have to drill though both ur silencers, taking away from performance and it'll be a bitch to drill though aluminum, packing, and the metal mesh on the inside, then running the wires and a coil will be hard, then if your just cutting off the gas and running it though the pipes hitting the plug and sending out flames, when you send straight gas though the engine it washes the oil off the engine parts, which aint good either, not really worth it unless your doing it to a show vehicle