What is a wye?
It is possible that the ip and injectors were replaced. The original owner was a very procedurally oriented 'by the book' county sheriff who used it pull his slow-moving-deer, and he definitely kept it up. I wouldn't consider upgrading them unless I need to replace them anyway.
Correct me if I'm mistaken, but the R&D upgraded turbo exhaust housing and downpipe is the same for my factory turbo, or for the stage 1 turbo. So, if I want to upgrade to the stage 1 at a later date, at least I already have that taken care of. Also, it should be easier (fewer hours means fewer dollars) to r&r the turbo a second time, after the shop does it this week to install the housing, downpipe and WW2....
I just hate to spend all that money on parts and labor to install the downpipe, housing, and ww2, when I could buy the stage 1 turbo for the same money. But since I have to pay for the work, I guess that's just how it goes...