Bigger is always better, The GXP upgrade
GXP upgrade is just like the F-body upgrade, it’s a direct bolt in though. There is no need to use spacers or tap the bracket. GXP calipers do use the F-body banjo bolts though. Nothing much more to say here as this all just bolts right in. I would recommend the OEM 12.7” rotors; they are $60 a piece and are molded with the drilled effect. This can be picked up at ZZP or pieced together (hunt eBay or RockAuto).
This setup also requires 17” wheels with a correct offset (despite what ZZP says)