ok, so i got my new msds headers and y-pipe in, but i have one question. do i need new header gaskets before i get them installed? my car has over 100k right now, but it only has to last another year. i'll be doing a rebuild/3.0 hybrid upgrade. but at this point should i use new ones. the directions say that they came with everything needed for the install but didn't come with new gaskets. i have no idea on this issue. all help is appreciated.