What highflow cats do you have? Either one of them is bad,and or you have a bad 02 sensor. I think it's time for a tune man! You did the exhaust install? Check the whole system for leaks. Pull your 02 sensors and have a look at them. Etc....
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Swift springs | upgraded headlights | stillen gen3 cai | FI HFC's and FI CBE | ecutek tune in the mail! 
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