ok, i installed a header and cat the other day on my civic ex, but the stock brackets arent useable on the new parts, and now when my car starts or hits a bump, i can hear the cat hit under my car. I have a catback exhaust too, and everything is bolted up sweetly and it works great, but there is nothing that holds it in place so that when there is vibration it doesnt rattle against the car. has anyone had this problem? i did a search and saw some similar things, but nothing too helpful. Does anyone have any suggestions? or should i go to a muffler shop and have them weld me a bracket on the cat to hold it in place and away from the car? thanks