Haven't posted in a while but thought I'd jump in. This is probably not cheap, but it is a true well engineered 12V supercharger - VTES system. I believe VW was experimenting with some sort of compound forced induction system that used a 12V powered supercharger.

BTW, this company also has an exhaust powered generator.


Lee
'94 LS, 3.0 V6, Auto, completely stock