Originally Posted by Snow Drift
1) Racecomp Engineering (RCE) front and rear 25mm sway bars (Buy GR STI sways for 2011+ WRX)
2) Bilstein/GTWORX Cup Sport Kit Struts (stock struts can't take lowering springs)
3) Racecompe Engineering (RCE) Yellow Lowering Springs
Agree with the sways, but I'd go full coils if you wish for more customization.