Grinding noise after intake install

[Offrd19]

Ok guys, I just put on a K&N air intake. After I got it done and went for a test drive it makes a grinding noise when I let off the gas and the turbo is wrapped up. Anybody have this problem before?

[tonypagnano]

something must have gotten into your turbo...

[Offrd19]

Ok, talked to the guy at the local performance shop. He said it was noise from the waist gate that I was hearing. I gues it was due to me not letting it warm up enough. When the truck is warm I don't hear that noise. Maybe he's right.