muffler questions for Impala

i'm new to impalas, and i have a simple question: Can just getting a muffler put on change the sound of the car, even if you don't get a cat-back exhaust or any other mods? I'm asking this because i dont have enough money to buy a full exhaust system setup, so i was thinking of just having a muffler put on, like maybe a magnaflow?

Any suggestions would be greatly appreciated. thanks