That whole setup is for the blow by catch can. They probably realized they over did it a little bit for a 6psi turbo.
QUOTE:
I have a question.... Notice the crossover tube plumbing behind the shock tower brace in this photo:
http://www.mazda-speed.com/gallery/M...-Pics/DSC06675
Now look at this photo:
http://www.mazda-speed.com/gallery/R...edmx504_engine
Why no crossover plumbing on the VR one?
ENDQOUTE
S.
That whole setup is for the blow by catch can. They probably realized they over did it a little bit for a 6psi turbo.
that picture is one of the early promo shots...
It was probably a late edition to teh design. If you look there's also different routing on the lines from the boost solenoid, as well as a different method of mounting the solenoid.
I'm sure if I looked closer you coudl find other differences as well...