Hi all, I have noticed a few people upgrading turbo's, typically on 1.9TDi's etc. and I wondered what turbo would be the next step up for a 2.0TDi, what sort of gains i would see, what other requirements needed in order to run it, aswell as the price for the actual turbo? New or used.. Does anybody have any idea? i see k03/k03s/k04 popping up here and there.. Thanks!