Originally Posted by Cay_PI

First, the 4.0 isnt exactly the cup engine. Its the basis and close. But not the same. As allways with the street vs. race engines. Cup has a sequential gearbox and ultra light flywheel.

I have further information on the SMFW topic regarding our street cars. For the manual gearboxes, its a traditional flywheel (dual mass in the .2; dual mass or single mass if speced in the R). The PDK cars dont have a traditional flywheel. The part doing the "flywheel job" is part of the PDK box. In the .1 its a lightweight part, comparable to a SMFW. For the .2 tranny they used a heavier one to bring down vibrations. Thats why you dont have the goergous tranny noises anymore. In the parts catalogue they use a standard terminology (DMFW) for all PDK cars.

Btw. if your .1 PDK dies you end up with a replacement part without the noises Also, fitting a SMFW to a .2 works but increases the stress on the bearings.