i got my new headers yeterday and i will be putting these on tonight and have never done it before. i have somewhat did misc. work on cars before so i have some mehanical know how. i have a 94 gt w/5spd and it is stock. i will also be replacing the h-pipe and catback at the same time and wanted to know if there are any booby traps and do i really have to remove the plugs and dipstick tube? any help would be appreciated....oh by the way they are 1 5/8 flowtech shorties, unequal length.