Well Perry about flange thingie that askes about, I used to work at a machine shop, not any longer thoug SORRY. and the for the high flow cat. from CATCO is a unaverisal cat fo $49. at SUMMIT, and I put it where the res. used to be, it would be to hot to put it next to the header. Also, I guess I didnt put this in very good words early, IF you buy the shorty header IT WILL NOT be a direct fit to your cat. in the contour. THE best way to do this is to put the header on and take a cat. off a focus and cut the end off of it and put it on the header, and then buy a high flow cat. and relocate it. Perry and every one else,let me know if this helps you any better
