I own an Audi A3 1.4 TFSi (125HP) and I am currently looking to switch out the stock air filter for an open air filter system. I have searched through many forums and pages but have not been able to find an answer to this question: Is it alright to remove the stock air filter from the filter box, and connect the cone air filter to the box directly from the outside? The air will technically be channeled from the outside, into the open air filter, travel through the empty filter box and then into the engine. Theoretically, it appears that there is not difference being made, just that the stock air filter box will store some reserve fresh air? Has anyone here done this and can advice me if this is a good idea or not?