[Warp3]

The GFB crank pulley is underdrive and lightened. The alternator pulley in the kit is smaller which cancels the effect on it so only the other components (A/C, Power Steering) get underdriven.

I picked up one from Dale the other day, just haven't installed it yet. He had a blue set in stock when I was there.

 

[Warp3]

The Go Fast Bits Pulleys have all 3 for 220

If you can still get one of those sets. According to Dale @ Teague's Auto, GoFastBits no longer sells the 3-pulley set due to the differences with the PS pulley between models (98/99 changed the PS pulley spline count, then it was changed again (to a "pressed-on" pulley) on the 02+ WRX). So instead they now sell a 2-pulley kit which should fit any modern Subaru motor.