Rattling noise coming from inside when secondaries open up on MTX

[Jr's Sho]

Ok so I'm new to the MTX world. I picked up my car yesterday and noticed right away that whenever my rpm's climb around 4,000 or so, something begins to vibrate inside the car, it sounds almost like it's coming from around the clutch pedal area. It has the sound of a loose heat shield rattling around, or something like that. Or maybe it could be the speedo cable? I'm hoping someone who had the same problem knows exactly what I'm talking about. Any input would be appreciated.

 

[Speedy_91_SHO]

I don't mean to send any bad karma, but before my clutch went bad, my clutch pedal started vibrating. The next time you hear the noise, pull up on the bottom of the pedal lightly with your foot and see if it goes away/changes tone/pitch.