From some pretty convincing internet dyno videos it looks like the best "free" HP for the 2024 Mustang 5.0L is to remove the carbon capture material from the two air intakes (about 40 minutes to complete) and to swap out the two restrictive engine intake air cleaners for K&Ns. about 10 minutes and a few bucks. More HP on the dyno and better acceleration. Seems harmless.