If you know an upgrade that can still allow 18” wheels fitment, I’m very interested.If you aren't changing the size of the rotors, or going with 4+ piston calipers, changing rotors and pads isn't really an "upgrade", that's just normal maintenance.
There isn't one because you are limited to 18" wheels already due to brake size. And some aftermarket 18" wheels don't even fit. You can change pads and rotors all day long, but neither will increase the surface area of the rotors or pads, which is what is really needed for better stopping.If you know an upgrade that can still allow 18” wheels fitment, I’m very interested.