Close your eyes for a minute and imagine building your perfect turbo'd Audi A4. Think of all those aftermarket parts you'd stick inside that engine bay, from the front mount intercooler to the stronger engine mounts, and of course the insanely big turbo. Picture that laundry list of parts that span the headlights up front to the exhaust pipes in the back. What would you add to the car, get rid of, or replace in order to handle the increased power load?