ok, I searched and read a few threads on cutting into a stock pipe for a 220. Here's my question(s). First, i'd like to hear from anyone who has gutted one of these pipes. Some said worth it, others not so much. I have all the tools, air cutter, welder to do it right. Second question. Wouldn't it look better if I cut out the area on the back side of the pipe that I can weld back and will never be seen? Seems like I could cut out a rectangle section on the back side of the fattest part, cut out what ever might be inside and then reweld. Am I missing sonething? I have two stock pipes so if I ruin one in the process It's not a big deal. I just hate to spend $200 bucks on a new FMF if this is going to be worth it in performance. I just bought a 97 220 that is beat and have enough spare parts to make it look and ride like a new bike but don't have an extra pipe. Only paid $750 but would like to keep it less than $900 for the whole project. It's an extra KDX to take with us on trips in case we blow up another bike. But, I want it to hold it's own with my other KDX and RMX's. What do you think??