I can't tell you how to spend your money but I can give you my opinion that you are wasting it. Your car is a family oriented car with limited power and not built for fast cornering or good handling so what what difference do all these "racing" struts and bars make? Painting racing stripes on a pig is not going to turn it into a race horse. A K&N filter is just a replacement washable filter for the OEM paper filter; sorry there is zero improvement in performance. How much you spend on your Slyphy isn't going to turn it into a Jetta.