Audi R8 Heffner Turbo 4.2 V8
 

I may have found the perfect R8 that I was looking for. Does anyone have experience/thoughts on the 4.2 TT Heffner set-up? Reliability? Build quality? It has been on the car less than 3k miles overall. I was considering a V10, but this V8 TT could be an interesting alternative.