So the headers are just open with dumps, no mufflers or anything?
Get an off road mid xpipe or hpipe, some intermediate tubes left/right ( they are different ) classic flowmasters and you can either dump em at the axle or get the axle back pipes that go over the axles and out the back.
Im in the process of replacing my entire exhaust right now. these parts will fit your fox
for long tube header may require a header flange on the headers.
these are the intermediate pipes that connect the H-pipe to the mufflers.
then after that you can choose a cat back witch will include the mufflers all the way back to the bumper, or you can just put the mufflers and dump em at the axle.
Here is a list of some of the cat backs that summit offers.