I was speaking to a hpd officer the other day who works with me. He said that they give the tickets to people with super loud exhausts. Becuase people put mufflers on 'em that are ridiculous. Anything that meets the CA standards, I would suspect should be fine in the eyes of a officer. It won't be too loud. He said that they are giving tickets just because they see the chrome tip on the aftermarket exhausts. A black muffler would be best in those cases. He also said that a lot of the local officers also mistake induction from the aftermarket intakes as exsessive exhaust noise. I'd fight it.