Searched and couldn't find anything helpful...I have a 00' civic H22a4 swap. When I hit 3k there is a very strong and annoying rattle that seems to be coming from the cat/ engine bay area. I checked everything and even took off the Cats heat shield and still, I hear the loud rattle at exactly 3,000 rpms. I always figured it was the heat shield cause everything else is in order... only thing I can think of is that it is the Cat itself... Any ideas?

Please help me keep my sanity,
Nate


Modified by nato at 3:05 PM 5/2/2007