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removing the catalytic converter will give you about a 10-15% power gain problems is with most the newer car there all obdII and if you take the converter off you will set a check engine light and the computer of the car will still try to fix the fuel air ratio which will kill your gas mileage if you want the power gain and still be able to pass emissions and have no fuel map problems get a 3" high flow converter it would be like removing the stock 1

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16y ago

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