Quote:
Originally Posted by Davo53209@yahoo.com
Do you think this aftermarket CAT will achieve the same mpg as an OEM part?
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The cat will not affect economy. A/F ratio calculations are based on the upstream O2 sensor and are not affected by the presence or lack of a cat. Does your car have a downstream O2 sensor? If so, this one is only for cat efficiency calculations to determine whether the cat is doing its job or not.
Someone correct me if I am wrong.