After a lengthy R&D process USP Motorsports is pleased to announce our Intake System with heat shield for the 2013+ Audi S6 4.0T. The factory system runs (2) 2" plastic pipes, and comes together and expands to a 3.6" pipe/filter. Our upgraded USP Motorsports system features (2) 2.5" aluminum pipes, to a 4" pipe and cone style filter. The system also includes an aluminum heat shield to protect intake air from engine bay heat. As a result you yeild lower intake air temperatures.