I put a Chimera intake on first, 13 tooth sprocket ( for woods riding), then got the Supertrapp pipe and it was quite noticeable. I picked up 4-5 mph on my track and very noticeable mid-range.Well just took the Monkey back out for a rip today with the stock exhaust back on, and without any other mods, def results in more power across the band. For those that say they don't see a difference, I just don't understand. Either you didn't log as many miles on the stock before switching to the Takegawa, or I don't know what. It's very obvious to me, and I've only put about 400 mi on my Monkey.