I have a BW T4 S366. .91 A/R.
Here she is next to old K04. IIRC the BW turbos are a little bit heavier than a GT series turbo...so if you have a **** manifold, it could end up cracking it. And a lot of the BW distributors won't sell turbo braces etc.
Anyways, here she is.
Here are some other random objects, to give you an idea on size...which can also become an issue.