I have a 2009 MCS and when I rev the engine there is a tingy constant noise that gets louder with the RPMs mostly on the right side but is non existent when it's idling. I don't know if it's the heat shield, cat, or what but I would like to get it fixed because it's annoying while driving and the noise bounces off bridges and such. Thanks

 

can you put up a video of the sound its a little too vague to come up with an answer.

-Jim

 

it is a loose metal noise, a vibrating noise, or what? explain in more detail please.