To the OP; in short, no.
The factory 11" setup is good; best thing you can do is run a set of premium pads like Hawk or EBC. A bodies are not known for racing prowess where turns are considered.
I ran my Trans Am before Covid at Sandia Raceways in a weekend class. Other two classmates had late teens Camaro and Corvette with stock suspensions with LT1 engines. My LS3 powered TA has 1LE front rotors with stock calipers with Hawk pads and our drum-in-hat rear setup with S10 rotors and Citation calipers.
Car was pronounced very well-balanced after a drive by the instructor.
The Camaro only bested me once - I drove my Pontiac hard, and the Corvette was driven timidly. This setup was adequate for a 3,350 pound TA with manual master driven on a track in anger and is easy on the street.
TBH the best improvement was the Delphi steering box.
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