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engine tuning

  1. General Discussion
    I see a lot of people talking about replacing the second cat with a high flow or removal of it and using a straight pipe. My question is, if we remove the 2nd cat will we throw engine codes? Also, should we just replace both cats with high flow ones, and will that cause problems with the ecu's...
  2. General Discussion
    Just like to know, who is (already) considering Tuning the Engine of his CX-3? And, what Engine and HP/PS does yours have?
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