Finally got around to installing these. Wasn't sure what to expect as I've read a lot of varying reports. First, installation was easy on my 2004 T100. Found a couple videos on YouTube to augment the instructions from this website. Pretty straightforward with minimal difficulty. I'm not by any means the great mechanic so believe me when I say anybody with some tools could pull this off. Difference in performance is noticeable right away. Much less gasping and popping while idling. Rides a lot stronger and, as far as I can tell, has a little bit more pick up. Definitely recommend performing this procedure. Probably the best 25 bucks I've spent on the bike so far.