What's involved with putting the 4 piston calipers on the rotors of the NA? I know it cant just be simple, but is there anything possible short of doing a T2 drivetrain swap? Or maybe even the brakes off another make/model.. anything, I"m looking for increased stopping power but not as extravagant as a brembo kit. I dont even think they make a 4 lug kit. Has anyone done this swap, or is there a faq about it somewhere? Thanks guys.

I believe the usual method is a swap to the 5-lug setup. Then you get the 4 piston calipers, more rim options, and that oh-so-coveted 5th lug.