Yes very much so! There are a few pipes that it works well on but there are also a lot of pipes that lose performance when coating. I had a short discussion with Mat Shearer a long time ago about this. Not so much the exploding in the pipe thing but the way the heat moves. I have only heard of inner pipe exploding that bad one time and it was in a shifter kart with a CR500 motor. It's all about the design, and a properly designed pipe would not benefit the coating. In fact it would effectively ruin a well built set of pipes.