For others interested, I spoke with Amber on the phone just now about the buy and seems they won't allow substitutions. I was interested in their 3" o2 housing or at least an o2 housing with wastegate recirculation, but she said I couldn't do it. Sucks, as I was waiting on this turbo and really wanted to take advantage of these great savings
Robert any chance you can help out on that so I can get in on the group buy?