Will it create a check engine problem?There's quite a few people who have deleted their mufflers. It doesn't sound horrible. I'm sure it drones like crazy though.
OP, to see what it sounds like with mufflers deleted check out Tork Motorsports YouTube. Or Google "Kia Stinger muffler delete". That should give you a good idea of what it will sound like.
Will it create a check engine problem?
Absolutely. People have dyno tested muffler deletes, and exhausts with evc closed vs open(similar difference as muffler delete) and saw 5-10HP+, and 10-20TQ+.Other than sound, I wonder if there's any benefit given the restrictions further forwards..