If I rev my engine in neutral to 6300, everythings sounds normal. But when I am in first gear and go past 6000rpms I hear a very fast clicking noise. I thaught it might of been my intake hitting the battery case. I put a rubber piece in between the pipe and battery and noise did seem to differ alittle. I just want to make sure it is not tranny and I know it is not cv.

 

My car always made a funny noise after ~6krpm. I thought this was normal

 

Could be your engine drivetrain screaming "enough all ready!!!"

 

most likely some kind of vibration, but you shouldnt go much past 6000 anyways,