Hi Aaron,Show us these dynos in"the real world?" Because I have a before and after, with no other changes aside from a tune to account for the changes to the outlets, showing gains throughout the entire rev range, with peak gains of 13whp and 52wtq. That's a 10% torque increase, for a few hundred dollars and less than a day's worth of work.
I have the two piece metal vrsf ones from rob. Nightmare to install on an e60. Doable. But if your not going for over 500hp.... save your sanity and keep the stock outlets.The big "mouth" opening of that new outlet is going to do nothing for you, as the turbo it is mating to is going only be the size of the OEM outlet "mouth". The OE pipe's transitional adapter is actually going to help out your cause, not hinder it. Anyway the lack of the transitional adapter looks cool by itself but you need to consider the parts working together.
Ultimately if you are a Stage 1 turbo you are likely well below 500whp, so save the headaches and just use the OE outlet.
Rob