Title says it all. I'm surprised that no part maker has followed what Alpina are doing with their D3 and adding a Bi-turbo to it. Alpina say that the bi-turbo is made up of a small turbo and large turbo. The small turbo gives a big boost at lower revs and the large turbo allows the 4 pot diesel to rev past 5000.
I'd love to get such a turbo for my car.
What are the options? And are there any turbo kits for the 6 pot 330D?