If you were really looking to stay with stock internals, you could do a kit pretty reasonable but you would still be at the cost of a TT swap. I see the supercharger having advantages over a turbo, but that's just my preference. It's hard to convince a group of people that own one of the best TT cars ever made otherwise, but to each his (or her) own. When I purchased my ATI, it was about $2500. I would definitely recommend an intercooler even though ATI says you can do without at low boost. You would also need 370cc injectors. Beyond that, any bolt ons you do would just be gravy. I could really sit down and figure out exact numbers if you would be interested.
