I'm guessing you mean the shift knob thread pitch, it should be M12x1.25. As far as suspension goes, the FRP kit should work on your 2014 just fine. OR You could look at a few coilover sets, I believe there are a few for under 1k now. I went with Koni STR.T shocks and H&R super sport springs for a 2" drop. Eibach rear sway bar addition and wheels and tires are all good mods for the fiesta for better handling. It all depends on what you want though. Take a look through the suspension section and do a bit of research before pulling the trigger on anything.
2014 Fiesta Sedan S 5 Speed
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