Do the Gundo hack on the muffler, it’s essentially the same as the sport exhaust except it’s always “on”.
For brake pads get Ferodo DS2500 pads, they are a terrific pad for both street and track.
Will check out the gundo mod.
Already ordered rotors+pads. Got Hawk HPS 5.0 / HPS - Don't need much more than that as it's a street car and I have the Camaro for racecar things (which I have some Ferodos for actually)