It is an easy install to do and only takes a short time to do it. It was the first thing I did to my 08 ZZR600 and it had a very noticable difference. Now I cannot wait to get my Yoshi exhaust to see if I notice another difference. Then Shim the carbs, New Air filter for increased flow(Stil undecided as to what brand) then who knows whats next. lol.Thanks for the info found what I was looking for cant wait to install it. Im trying to do all the work myself is the advancer EZ to install?