There is no comparison.. The Z06 Brakes are PBR calipers that use a multi-pad design in conjunction with alignment pins. (yes there are one piece pads available, ill get to this)
There are several issues with the Z06 caliper, having owned these on a corvette I speak from first hand experience.
1. They taper pads badly, even when using a one piece pad.
2. The alignment pins seize into the caliper and are expensive to replace.
3. The caliper just is not nearly ridged enough.
Mounting position and rotor hub/offset appears to be the same. If GMT900 stock brakes bolt onto the GMT800 these would be backwards compatible as well. Stoptech is very tight with the differences between their kits and they don't really like to give up the details.
If we can find a GMT900 truck locally to install a set on we will give them deal on the kit to confirm it as well as assist with and document the installation. One thing not mentioned above is that we can get the rears as well and can offer a COMPLETE front and rear package for a price to low for me to even mention.
We made a deal with Stoptech when we were at PRI this year to offer these to the truck community at a steal. You will NEVER find them cheaper.
