Hey all,

Looking at some caliper specs for the GXP and 06+ Impala, aren't the calipers basically the same except for the brackets and some cosmetic differences?

Both are dual piston, pistons appear to be the same size unless I'm reading the wrong data. Maybe the caliper bracket changes the caliper location to allow use of the 12.7" rotors?

It might be waaaaaay cheaper for people to buy the 06+ Impala calipers at a junkyard, and purchase just the GXP brackets and rotors online for the 13" upgrade.

I can't get any part numbers to match up though, anyone have any more details on if these calipers are physically the same?