I've sold quite a few, quite popular for Fiestas Mk6 and a few guys run then on the 1.8T engines, but I haven't any working knowledge on the 2.0 TFSi engines I'm afraid
Build quality is nice (Come out of Pipercross's factory!), and the mesh gauze gives a nice raspy sound without it sounding too deep like the Pipercross can sometimes sound or too metallic.
Hope this helps
Andy