Originally Posted by suss6052
That's definitely off topic to this thread, as this is talking specifically about the Ford Racing Axle Back kit for the N/A Focus using the ST rear valence and rear muffler.
You would have to cut and rotate the tubing after the flange on the ST exhaust system if you were to use a cat back section on the N/A model. For a sedan you need around 6.9-7.0" extra inches of pipe in order to make the axle back section mate to the front section of the exhaust.
Twenty has installed the full o.e. cat back exhaust on his STdan (ST inspired sedan)
Which can be seen here:
I was trying for it to remain semi on subject since the point of this exhaust is to mock an ST center exit. i was trying to point out it could be cheaper to use an aftermarket ST catback in place of this one.