There are plenty or front aftermarket calipers. But how about the rear?? Just seems that someone would make something so the braking power is more even. just me though. Thanks.

 

Wilwood makes a set and can be had for ~$650-750 US from ls1speed.com It's a 4 piston caliper with a 12.19" rotor. You will however need to order the Wilwood parking brake kit not listed on ls1speed's site but the PN is on Wilwood.com and I am sure they could get it for you also.