What state are you in?
There are some CARB legal LTs if you need them. Many states don't do the sniffer or only have the test on '96+ with the OBD scanner, which is nice. I've run my F150 with LTs forever with a highflow cat and it passed fine until I decided to do away with the emissions part and register it out of state.
Stock plugs/wires are fine.






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