P600B Questions...

Who likes the bypass valve that comes stock? I was thinking of changing it since I'm only seeing about 5# @ 5K with a 2.9" pully. I hear bosch110 is the way to go. Who's got good prices on these? Best I've seen is on Saabpartsdirect.com for $52+shipping. Are the tubes the same size?

Also thinking of going to the 2.7" pully. I'm getting 366rwhp in 95' conditions now and just trying to hit 400. Where is the best place to get a pully? $90 shipped from Procharger just seems a little high for one damn pully! Maybe I can get a local machine shop to turn a couple 1/8th off of the one I have for less...

What do ya'll think?

-Jonny