I use and sell rocket pipes, because after I tried then, I couldnt beleieve the difference they made. They are not necessarily drag pipes though, they do have that reputation though. Sure you may get some more low end out of PT high revs, but the difference is not all that great. You just gotta learn to keep your "R"'s up, and you wont even tell the difference. Trust me, even with the 34mm carbs I have, I cant keep the front end of a relatively stock rz350 motor (in my banshee) on the ground with these pipes.