TGK Motorsport Intake(s)

The TGK Motorsport intake is available at:

TGK Motorsport Audi 4.0T Air Intake System

There is also a secondary model that includes an adapter to utilize the stock air box, eliminating the annoying accordion hoses and giving you bigger inlets in the process. 

TGK Motorsport 4" Intake With OEM Air Box Conversion