downpipe and inlet manifold questions

[HORCH]

I would like to make a 3" downpipe / system and reverse the inlet manifold,

I'm going for an RS2 set up in the near future,

to cut a long story short does the S2 downpipe bolt onto the RS2 turbo but have a different bore? I dont want to make a downpipe that I wont be able to use on the RS2 turbo, I might aswell wait until I get the RS2 parts, I've read it goes from either 2.5 or 2.75 to 3" straight from the flange? is that right?

I also read a thread on here a while ago about someone who had chopped the inlet manifold across the 5 inlets, turned it round and welded it back up and changed the angle of the throttle body elbow bit, I've searched but cant find it again, and as for the downpipe search I didnt get any answers,

thanks for any help

[Greg_S]

Horch, The RS2 turbo fits onto the downpipe, with larger turbos it is worth checking the outlet of the turbine housing if you plan to go bigger.

On the inlet manifold there will be lots of fab work to do if you turn an OE manifold around, its worth building or buying a manifold to suit

[HORCH]

cheers greg s could I use the flanges from a 7a inlet manifold if I were to make one from scratch?