05's and up do have cats. I'll take pics of mine tommarow as i just pulled the header off to punch out the cat. It is located at the bulge right after the collector. There are 2 ways of doing it... one is to use a cut off wheel and cut a square out above the cat itself and take it out that way and have it re-welded..2nd way is what im going to do is just punch out the cat with a good ol pry bar and a hammer and just brake up the cat itself and remove it in chunks so i wont have to cut the top and have it welded up. What is weird to is after the cat is a divider which deffently seems to be another bottle neck besides the cat in the oem headers.Ive had a couple friends do this and without the cat the bike does run cooler for sure. As of now i only have a K&N and a akrapovic slipon. I pulled my plugs and they are very dark... darker than i would like them to be so i know it is running rich. I have no pc3 but that will be on the way soon enough so i can get a nice tune on her with my current mods. My goal is to get the stock header to perform just as good as a aftermarket one, which i cant afford right now lol. Ill have some high-res pics up tommarow of all the work i do on her.