Without a tune gains will be minimal.
You may get about 10whp from CAI, 20whp from midpipes, 10whp from catback & 10whp from IC. Potentially 380whp, or about 15-20whp less than Stock Stinger with ONLY a JB4...

However a chip/tune will increase all those numbers significantly and you should easily be pushing 450whp+ with full bolt-ons.
This doesn’t make much sense since all those bolt-ons are much harder to remove than a piggyback.

And unless you plan to remove all those upgrades every time you bring it for service Kia will likely document those
mods and hold it against you for any related issues.
Very unlikely, but possible depending on the dealer. It would also be the dealers responsibility to prove it directly caused the damage. However if you really feel that way then why do bolt-on upgrades at all?
Sounds like you could save yourself a lot of time, money, and risk just getting an easily removable chip instead.