I honestly don't think that it will ever happen. They had been saying they would be here by the last 1/4 of 2014, but that has come and gone!
The Cat back exhaust & Down pipe were supposed to get released in Sept 14, but that never happened and I am still waiting! I have found that their parts are very well made and relatively easy to install.
Here's a run down on what I have aquired over the last 12 months or so -
Installed:
Mountune MP215 Tune
Mountune air intake
Mountune front mount intercooler
Mountune boost pipes
Mountune induction pipe
Mountune short shifter
Mountune sport springs
Mountune wing extensions
Mountune boot & floor mats
Mountune gear gaiter
Mountune shift knob
Mountune roll restrictor (RMM)
To be installed:
Mountune coolant hoses - requires draining coolant and getting to awkward clamps, too much effort for 0 gains.
As you can see from my list, I like Mountune parts, however their customer service is rather poor, both pre sale & post sale support. Also with the releases of the facelifted 2015 FoST, the new mustang, new GT and upcoming RS, Mountune will be focusing on developing parts for those lines. Not to mention their partnerships with the BTCC focus team, the Olsbergs MSE rally cross team, and an Asian touring cars focus team. They are a busy bunch!
I do have a build thread on another forum, for any that haven't seen it, here's a link:
My build :
http://www.fiestast.org/forum/showthread.php?t=1412