front end - end that makes contact with the engine screw-on dome end - the "butt" end. My guess is that it doesn't matter in matter in most cases but this is about design superiority and theory. It seems to me the front end design is superior, so far superior that it's a no-brainer! The front-end design means that the filtration media is bypassed entirely. in the dome-end design the rushing of the oil means some of the trapped particles are pry'd lose and gets recirculated into the engine. So, why are dome-end designs still used? so do u choose ye Filters with that consideration in mind?