Loking at geeting a new cat back exhaust for my 7.5 zetec S. does anyone know if the mountune ST exhaust will fit onto the Zetec S? my thinking is it should be the same layout but im not sure. has anyone had any experience and has anyone heard one?

http://www.mountune.com/index.php/services/performance-upgrades/fiesta/fiesta-1-0t-2013 pr maybe this one?

People put the ST back box on the ZS, you would need to fit the ST diffuser though.

Willy on here has fitted them to his titanium X, have a look in the projects section.

Could a cut out of my diffuser suffice for now? if done properly of course

I'm pretty sure, not 100% by any means, that your engine is a 3 cylinder and the mountune is a 4 cylinder exhaust- meaning the manifold  won't fit. Very expensive mistake at 500 odd squids for the mountune exhaust, just for a sound it probably won't reproduce on your engine anyway. The stock exhaust on my st growls, the mountune I have booked will increase that growl

The mountune one won't fit. 

I indeed have an ST backbox on my titanium and would say it's well worth doing.

 

So I should just get the back box?

5 hours ago, Crraigan said:

So I should just get the back box?

Yep, and the ST diffuser ultimately 👍

On 20/08/2016 at 0:57 PM, Willy said:

Yep, and the ST diffuser ultimately 👍

I keep looking online but can't find one. Will mountune sell it with just the back box if I ring up?

Mountune won't sell part of the exhaust system. You need to get a backbox from an ST Owners who's taken there's off.

It'll look like the top one ....

You then need an ST defuser, ether second hand or new from Ford

Lower Painted Stone Deflector - 1819019 - £52.00

http://www.fordpartsuk.com/shop/ford_fiesta_rear_bumper__stone_deflector_primed_2013_f_1819019_c_1180.htm

Upper Mesh - 1866724 - £63.00

http://www.fordpartsuk.com/shop/ford_fiesta_rear_bumper_honeycombe_style_stone_deflector_f_1866724_c_1180.htm