Thats funny cause I and many other ppl have been running it for years now with now without any problems.
Did you reset your ECU after you added the copper pipe?
I actually didn't even do it to kill a moose noise (didn't have one) I did it to kill the tremendous Throttle Hang I was experiencing.
Also I have tried revertting back several times and each time I end up putting it back in due to so much throttle hang
Go Figure