so im new here. hope this is the right place to post this. but i was looking up some set up for my kids 2000 cr 125. and i see this exhaust spacer or torque spacers. so im just making sure . this is like a washer that goes between the manifold and the pipe? or the head and the manifold? some guys are talking about gaskets. thats why im not sure and cant find pics. can someone explain this for me