I do not know what this sound is I want to say bad cat but I am not sure. Is there anybody that can help me out?
2000 Cavalier Z24
Mods-
CAI
Upper and Lower Motor Mounts
Magnaflow Muffler
B&M Shiftplus
After messing around with it a bit more I feel like its more of the flex pipe.
Your downpipe/header gasket or flex pipe if you have one there.
