has ne one installed the vortech s/c with the ur pulleys on a 03 g35 6mt?? i have the ur pulleys now but after the g/z meet at evolution i felt like the only one w/o the s/c. any tips? which belts do i need?

 

I would not use the underdrive pulley with a SC simply because it is going to reduce the amount of boost the SC makes. Put the OEM pulley back on.

 

Absolutely do not do it!
When you change boost on the SC you do it by changing the pulley. You can damage your motor by using an incorrectly sized pulley, but any qualified installer of the Vortech would not let you make this mistake anyway.