You can improve appearance and sound. There will be no noticeable performance gains.
that being said, I put on a Borla climber s-type exhaust and like it.
I put on the racing optics film a couple weeks ago. Customer service was top notch and they were available to talk me through the install. Tiny bit of rainbow if you are wearing polarized glasses, otherwise you wouldn’t know it was there.
Installed Tazer Mini. Fixed the TPMS range, stopped the fast flash on my AAL fender turn signals, and disabled ESS. Also changed the Sport to a Rubicon on the splash screen because, why the hell not?