Well I had a check engine light come and i had my car dealership check on it and they said its a oxygen sensor, and also the cat that is attached to the header and they gave me a price of a new header and its like 1100 bucks which is stupid, and a oxygen sensor was like 165 or so i believe, so what should I do,and since i am needing to replace it should I go ahead with a header and then do exhaust back?????,i even was thinking about getting a ,mazdaspeed sport exhaust just really dont know what to do i have 900 bucks or so maybe a little more after i get paid what should i do?
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