Rustler made a stinger pipe that went out the back. Id look into that before slapping copper pipes together. It has however been done. I beleive it was on a dustler though. This thing was very loud, scale of 1-10, it was 11.
It made alot of people grin and laugh but it did run, the track wouldnt let him run it for racing though, but it was built just to bash with and to see how far he could launch it off of jumps.
Like I stated above, rustler had a 360 stinger pipe, would be alot easier to make that fit that bust out the copper pipe. GL