Well i finally got around to installing my H&R spacers/studs to clear the z calipers. I only drove a little on them, but they feel really smooth and strong. I did not tromp on them because of the break in period. they look really sweet.

 

you NEED to tromp on them because of the brake in period in order to bed the pads properly.

http://www.stoptec.com/whitepapers/w...otors_myth.htm