One exhaust pipe intentionally plugged off?

This may be a dumb question but I just bought a 2013 Gladius and I noticed that the bottom exhaust pipe is plugged off by a piece of metal… is this by design or did someone plug it off intentionally for sound purposes? Are there any drawbacks to this if so?

This may be a dumb question but I just bought a 2013 Gladius and I noticed that the bottom exhaust pipe is plugged off by a piece of metal… is this by design or did someone plug it off intentionally for sound purposes? Are there any drawbacks to this if so?