http://www.solidworks.com/sw/products/cfd-...is-software.htm
I think it is fairly impressive. You can't just use the software without first having a basic understanding of fluid dynamics though. Else the results wouldn't really have much meaning
If you have an RB25/30DET I can do:
Turbo
Manifold
Wastegate
Gaskets
Braided lines and fittings to EBC solenoid
Dump pipe
Wastegate plumback pipe
Front pipe to cat
All for $2200