X2 for me.
If you need any measurements for the C6 Z06 six piston caliper...here is my measurements. Bolt hole centers are 5" or 5.048.
The measurements that you requested for the C5 ( if you even need it ?)...is 3.40, pretty close ( since I don't have pads loaded yet)
I'll buy a set and deal with the offset if any and report my findings. What is the cost of these ??
Cheers,Vinny
Are these dimentions for the 6 piston calipers?