I was driving then all of a sudden i noticed my car sounding like it had a muffler when accelerating. I hear it from the front directly in front of me and where i rest my left foot while i step on the gas/brake, i feel a little vibration. This is the first time my car sounded like that. What can this be?

 

sounds like the flex pipe to me. had the same problem. the flex breaks after the cat. the sound is in the middle almost lower than the center console?

 

Check the exhaust out. Odds are it is the flex pipe though. happens to the best of us

 

Yeah that is I bet the issue. I had mine blow the cat flange on me one day lol talk about loud.