My truck has stock exhaust. It's quiet and restrictive.
My aunt (who lives next door) has a 91 chevy Corsica that's on its 3rd motor and the last time the mechanics replaced it they did a cruddy job on the exhaust. It has that exhaust leak sound (which makes her 3.1L slant 6 actually sound ok).
One time my friend told me that I have an exhaust leak because of excessive heat coming out from under the cab. You can smell it and feel the heat big time, but it doesn't sound like it. And the check engine light isn't on so it's not throwing off any of the o2 sensors.
Do I actually have an exhaust leak?
How can I diagnose?
I'm not concerned but a second opinion would be much appreciated.