you need and svt cat and flex, that the power steering line needs to be "bent" out of the way or replaced with the svt line, and the oil dipsitck tube should be replaced with an svt one, im not sure if the stock can still be used, but im pretty sure the stock wont work
if your not in a hurry to install it, make your self cat like Random Tec, esay job.
if you don't want to tampa with ur ps line, make sure you wrap ur headers then.... wrap the farthes left 1 really good so it doesn't heat up ur ps line. and then don't forget to spray it down. ( a nice smell will come from the wrap)
enjoy getting the bottom far left bolt out of ur headers... if ur header/ cat bolt was hard like mine... enjoy!
yes, this is the stock exhaust maniflod from the svt focus. except it has an egr bung added. anyway since this is svt, you have to have a svt cat and flex for it to work. trust me tho its VERY worth it in my opinion. one of the best N/A header out there.
here's a list of what you need to complete the header swap:
-cat(highflow, stock, or offroad pipe)
-flex(trubendz sells a 2.5" flex for $100)
-svt dipstick(comes with kit from ford)
-egr tubes(comes with kit from ford)
-gaskets:head/header(comes with the kit), header/cat, cat/flex, flex/catback(i reused
-bolts(massive sells a header bolt kit that has the cool allen head bolts for cheap)
-O2 sensor extender, or O2 eliminator
-O2 sensor removal tool or large cresent wrench
make sure you have all of these^ and you should be fine
and pb blaster. also i didnt have to extend my o2's jut take them out of the loom untill you have enough then re loom them. anothe btw gut your flex from mcnews i got the trubendz one and its terrable. the welds are bad and its to short by about 1/8 an inch or so