I wouldnt bother porting that motor if your going to stay with the t-6's. The T-5s respond much better to porting. Also I have ridden a few bikes with that passion port, not to bring anyone down but I would stay away from that as well. I have heard nothing but good things about the Gorr woods port. Im on the market for porting as well, Im stuck between Grand river racing port job and the Gorrs woods port. Also another good choice for a pipe is rockets, Im more than sure you can sell those t-6s for about what you paid for them and pick up a set of rockets from minkia for cheap. Thats just my my 2cents!!