exhaust questions

i have a 1997 f150 with the 5.4L
right now im running stock manifolds to all stock cats (four cats)and aftermarket o2 sensors to a single camber muffler out the rear. if i took out my rear cats and ran maganaflow cats for the front cats would i throw a check engine code

so all i want to do is simple remove the back two cats and replace the front two with high flow cats will i set off a code?

 

in theory you shouldn't get a code. it'll be a loud mofo.

 

so...you wanna replace the 4 stock cats, with 2 magnaflow hi-flows? You shouldn't run a code. And if you do there's ways to fix it. And yea, its gonna be loud

 

you will prolly throw a code i do with just my rear cats deleted

 

well we will see boys im going to get my new down pipe from a buddy today and then im ordering my new cats this weekend and put it on the day all the cats get here ill post pics

 

i have all my catts out, and mine isnt throwing a code, ive had this set up for almost a year