i want to swap my exhaust manifold for a nice polished header system on my 2002 Honda Civic lx. Is it possible to use the OEM catalytic converter with an aftermarket header system? if not what are my options? I know I can't use a straight pipe or high flow cat. due to NYS smog regulations. I am not really sure what to do as I have to keep my "Check engine" light off to pass inspection. Please Help!!!!
Sorry, my check engine light is not on but if I drop my cat. converter I am almost positive it will come on.
Yes you can run the header with a converter. You will need to re-tune the car if you want to see any performance gain. With the header the engine is going to run lean until the tuning is done. The car may even run worse until it's tuned.
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