I just got warpspeed y pipe installed and it's great. The only problem is when I shut my car car off I seem to be getting some kind of squeeking or high pitch sound. Oh yeah I also put in a drop in K&N filter. Would the pipe be causing this. Any ideas would be greatly appreciated.

93 GXE

 

Are the bolts on tight enough. Maybe it's just settling.

 

I doubt there is anything wrong with the install because I had Jeff at Maximum Tuning do it and he knows what he's doing, very reliable. Hopefully it's breaking in like you said.