well Texas Bob from Palms, CA....
there's a man in Houston TX named Mike Staley that recently did a bi-turbo setup on a passat using the stock 2.8 V6-- using a couple of K03's out of a Stg3'd S4. I have no idea how much money Mike spent on it (he's a mech. and Houston's APR dealer) but he said it's a lot of $ but well worth it.
EDIT: damn, someone beat me to it!
