I like what you've done so far Sayyad. You can buy an aluminum skid plate for your A3 from Evolution Imports but it is not as large or aerodynamic as the skid plate I put on my A4 Golf. They are also expensive, however mine paid for itself when I hit a car battery at 50mph earlier this year. So far all I've done is to put lower grill block offs made out of coroplast and held on with velcro on my golf. For a while I also had wheel discs made of coroplast but the velcro could not hold the rt. front disc on for any length of time (I suspect a slight imbalance in the wheel kept causing that disc to be thrown off
) My next mod will be rear wheel well skirts if all goes well.