GO .25 on the way for my 8T. I'm stoked! I've been runing the GO7 all season and have been extremely happy with it. I always just wish I had a little more torque on the bottom-midrange. The .25 is supposed to have the top end of the .21 with more bottom,and similar runtime,so it sounds like a perfect truggy engine to me. I've got a brand new 053 pipe here waiting for it. I've got a few different pipes to experiment with,but the GO engines really seem to like the 053,although the 2013 helped wake the bottom end up on my GO7.