Originally posted by 00blackzx3
so the offroad pipe is so to speak my "Flex" ? And this will eliminate the cat?
No, the offroad pipe is the cat eliminator pipe. The flexpipe stays.
The race header replaces the stock manifold "header" and the cat, the flexpipe then goes between the race header and the catback exhaust.
Here's an image of your stock cat, flexpipe and exhaust. Might help. it's from the myFordFocus.com How-To Library for installing a catback, see http://www.myfordfocus.com/how-to/cat-back.htm
Obviously disregard the "cut here" part of that image, it's meant to demonstrate how to remove the stock catback
I'm only posting the image so you can see where the stock cat and flexpipe are...
Hope that helps.