We've been working with ZEX now to get deals on their Nissan VQ twin TB kits. The kit is the exact same one used on the 350Z. You will gain about 100hp with the jets that are included.
I recommend having a shop install it and run it on a Dyno to make sure your air/fuels are good. If you have us install it the Dyno runs and tuning are included in the labor rate.
Here are the packages:
Package 1:
#82238 Twin TB Kit
#82175 Twin outlet Purge
#82341 Liquid Filled Guage
msrp $1028.82
Forum price $935.28
Package 2:
#82238 Twin TB Kit
#82175 Twin outlet Purge
#82341 Liquid Filled Guage
#82085 RPM Window Switch
msrp $1207.30
Forum price $1097.50
Package 3:
#82238 Twin TB Kit
#82175 Twin outlet Purge
#82341 Liquid Filled Guage
#82085 RPM Window Switch
#82045 Bottle Heater
#82009 Bottle Opener
msrp $1642.95
Forum price $1493.52
Note: shipping is not included in the price, PM me for shipping info and labor rates on installs.