I have an Audi S2 Coupe.
It has several modifications:
RS2 ADU Engine
RS2 CRB gearbox
Garret GT3076 63AR Turbo
7A Cams
034 Motorsport Inlet Manifold
Custom Tubular Exhaust Manifold
RC Engineering 750cc Injectors
Aquamist 2d Water Injection
034 Motorsport Racing Radiator
Bigger (19 core) oil cooler
RS2 Intercooler
H&R and Bilstein Race suspension
Porsche 944 Turbo LS diff
Whiteline Rear ARB
Porsche 993T front callipers with 321 * 32 disks
Audi S8 rear callipers with 280 * 25 disks
Details of my installation - MemberPage/Gandalf/Install
Issues regarding altitude - MemberPage/Gandalf/Altitude