Every upgrade on this 1985 Audi 80 B2 Quattro has been taken from the Audi/VW parts bin to make it a worthy time attack race car. The engine is a 3.2 L Volkswagen VR6 from a R32 with a Holset HX35 turbocharger. The transmission is an Audi OB4 from an Audi S4 4.2 L V8 which allows 40/60 front-rear power split and is connected to the engine via custom adapter plate. The dual clutch is sourced from an Audi A5 3.0 TDI, the front brakes have are from a Touareg while the rear from a Audi S8 D2 and the steering rack is from a Audi RS2.
Source: AudiB2Quattro Facebook page, S2Forum (build thread in English) and RacingForum.pl (build thread in Polish) via ESD reader Peeter