Catalytic Question
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Catalytic Question
I have a 2004 F150 5.4 with the two cat's and two resonators? on the down pipes. Can I switch to the later style late-05 Catatylic set-up without issue. I have about 145K on the motor and am just starting to get the dreaded P0420 code. Oh and another question which side is BANK 1?
TIA
TIA
