Hello,
I have a copy from the original ABT brochure which tells and shows many STAGES of COUPE S tunning, according to the JOHANN ABT's pricelist...
But there is no specific refair or photo of the specific car in this ABT Brochure...
I have in my collection one black and white photo showing a similar Coupe S (without and engine).... and one article showing a typical Audi engine (with an older valve cover from an Audi F103) with the ABT ...TUNNING special inlet and carburators...
I do have also a colored photo showing a pretty stock BLUE Coupe S with an orange front spoiler parked next to a NSU TTs under an ABT STAND...
I still have the typical ABT front spoler plus the official ABT/AUDI TUV recognition document of this specific spare part.
Be well,
Theo