well said this is exactly what I`m having done to my truck right now, here is a link for homemade mil eliminators and they work too, it cost less than $10 for all the parts from radioshack just solder it together and you will have no CEL, I did it to mine, and to see if it would work I took both of the rear O2 sensors out of the pipe and and started the truck and no CEL!!!

this is the easiest way to solder it up
http://www.mustangforums.com/upfiles...B74B899C9A.jpg
Here is the page that has all the part#s you`ll need, just hit previous and next to see dif. pics
http://cobrasvt.homestead.com/files/.../mil_close.htm

 

Thanks....Did you remove all 4 cats or just the rear 2?

 

I removed all 4 and replaced those with 2 highflow cats, its sounds so much better and I can tell a little better throttle response

 

What size pipe are you running. Ive been told to go with 2.25 for true dual and 2.5 for a set up like yours. Just curiouse what your running.

 

I removed all four cats

I have 2.5" pipe

 

so to clarify. if i remove just the 2 rear cats the truck will still run fine and the check engine light won't come on? If i go with high flows the 02 sensors can still plug into them right?

 

YES