Exhaust System Change

[Jordan_95]

If I bought an ST180 Cat Back exhaust system would it be a straight fit onto my fiesta Zetec S ecoboost 1L ???

[Cablelad]

I think the ST diameter is different.

http://www.fordownersclub.com/forums/topic/69316-st180-exhaust-on-10-ecoboost/

Check out this thread mate.

[Nathan54771]

Could easily be made to fit with an adapter, but wouldn't fit the standard zetec s rear diffuser. You'd need to upgrade to the ST diffuser, but then may aswell use the cheaper twin tip tailpipe option for looks if that's all your after.

[Jordan_95]

I already have the ST rear valence

[Nathan54771]

just re read and realised you want the full cat back system, presumed it was just the back box. Not sure it'd fit at the cat someone would have to clarify. Otherwise you just join with an adapter if the pipe works different before the back box.

Won't make any difference though you know ? Just an expensive way of having twin tailpipes (that on the standard ST exhaust are cheaply tack welded on anyway)

[Jordan_95]

Want the twin tail pipes as I have the ST diffuser but what would you recommend then ?

[Nathan54771]

If it's just a cosmetic twin tailpipe your after, see this guide.....

http://www.fordownersclub.com/forums/tutorials/article/233-ford-fiesta-mk75-rear-diffuser-upgrade-st/

If you want cosmetic and abit of performance or noise, then go power flow for custom or buy a miltek etc.