4.0tt platform with a true full 2.5" intake runner all the way to the turbo. Inlet depression on the stock turbo can reach 750mbar while our inlet pipe doesn't drop below 900 resulting in a free 3-4psi on the top end. 30-40hp gains consistently at redline. 5 axis machined inlet snouts are welded to mandrel-bent tubing specifically designed for this application. Fits S6 S7 RS6 RS7 4.0TFSI applications. This does NOT fit the D4 S8.