I borrowed the pipe tools from a friend, sure worked really well. I got 4 pipes done with great results. I was using some big heat for some deep ones and 40 to 60 psi air pressure. got a few pics. did my not stock 86 pipe the 87 WR 250 pipe was rough after a season of single track, now its all good again. another 400 aftermarket pipe, all dents gone.