I have 2007 charger rt my car's rear end passenger side making popcorn like noise after I have shut off the car (maybe 4-5pops ) and while the car is at stop sign ... What i mean rear the exhaust and I think coming from the Flows

 

Are you running regular gas in it? I have heard something like this happening because of this. The car is tuned from the factory for mid grade. Now that spring is upon us and the gas is starting to switch over to the summer blend, what you might be hearing is your being pissed that you put regular in her. Basically tiny backfires.

If you are running mid grade or better, being that it is a 2007, your exhaust might be starting to wear out and might have some fine holes starting to form. You can start your car and lay under the back to see if you hear anything more clearly.

If that is not the case, then we can look at air filter needing to be replaced or even your plugs needing replaced. Have you done a tune up on it yet?

There is a couple of ideas to look at. Maybe someone will chime in with other options.