I looked through the old posts and could not find an answer to my question. From my understanding, the 2006 wrx uppipe does not have a cat in it. If the 2006 wrx does not have that cat, would it be illegal, technically speaking, to replace the original uppipe, in a 2005 wrx, with a new uppipe? I am trying to keep this legal because the sacramento police have been checking a lot of cars because of racing deaths, so i was just thinking about getting an uppipe, if it is legal, and a cobb ap. I am pretty sure that the cobb ap stage 1 is legal, so i am just hoping someone can answer my first question about the legality of an uppipe.
Any help would be nice.