Ok bought bos bros moria exhaust a little loud, light, looks killer,but holly shit lost all low end power. I used to spank my friends cbr1000 but now he is walking off and leaving me. Tried every mod i could and 20 different maps to get powerback no such luck. Friend says its a kawasaki spray it off the line or get a 14. Dont want to buy the wrong pipe agan. What is the best exhaust system or slip on for 06 zx10r that you have found. If not the stock system is going back on it and that a heavy weight. any advice anyone coul give me would be greatly appreciated. Got to get my power back and shut idiot friend up.