2002 Civic dealer groudn affects and muffler

Hey everyone this is my first post here and i have a question. I was at my honda dealer recently with my dad with his new CR-V. While we were there they had two 2002 civic ex's i think, 2 door, and they were factory ground effects and dual exhaust along with rims. Now i know that they had that stuff done somewhere else most likely but was wondering if anyone else has seen these, if the exhaust makes any difference in sound, and what you think of them overall, i personally like them!
Nick