[AiM]

Originally Posted by TDIwyse

You're so cryptic :-)

Does this image of the M57 turbo on the 535d have an isolated IWG passage like DWR was describing?

http://dencodiesel.com/products/turb...s-bmw-535d-m57

Is the hot side on the 535d different than the 335d?

That is just stock housing, no isolated IWG passage. I think you are looking turbine housing inlet, not outlet...

That flap in intake is the flap that is separates small and big turbo at about 3000rpm. That is also the reason why you can't use universal exhaust housings.

There you can find pictures how R2S system operates;
HERE