I retro fitted 2006 WRX 4 pot calipers to my 2008 WRX for many reasons. One of which is the fact that they are fixed calipers rather than floating.
-Maintenance is way easier
-2 extra pistons per caliper for better clamping force
-less prone to brake fade.
I had to rebuild these myself and I would do it again. I very much like how these perform and coupled with pads and slotted rotors, these brakes stop hard.
Place of Install
Myself, Benjamin Selk, my brother
Allow for 1 hour of install time without SS lines. You will need a rag and some vice grip needle nose pliers to pinch the stock lines so you don't lose all your brake fluid. I would highly recommend someone be there to help bleed the brakes. BUY NEW OEM COPPER CRUSH WASHERS FOR THE BRAKE LINES