read up on this: Neon technical, review, and information site it will give you alot of informations on different aspects of the neon. neons arent 420A i believe thats an eclipse code where the head is switched around(intake in rear). 420 is a comon misconception seeing 420=4 cylinder 2.0 L, sometimes it is alot easier to just say 420A because more people know it than the D4re that it is called