9 seconds, This may be a dumb question, But I live in a state where they check emissions once a year Do you think this would be a problem with the cats removed?9 seconds said:Milo55,
You may be right about questioning the catback. The real power increase comes from headers and high flow cats. Of course, if you install headers, high flow cats, and 3" midpipes, you don't want the smaller factory pipes in the rear.
Best bang for buck is delete the second cats or even all four. Really helps the sound a lot also so no catback is needed.