Anyone put a Magnaflow Cat on a 04 impala ss? If so, give me some feed back please. I am interested in purchasing one....
i dont have an SS, but i have that cat on my 00 base model and i can tell you that it might not happen immediately, but you are going to see a check engine light.the only way to get rid of it is to have it deleted from the PCM with a tuner. it will be code PO420. i was beginning to think it was an urban legend until a year and a half later when mine showed up.