Quote:
Originally Posted by bensonwu903
I'm interested in fitting the same header on my 328i, however, this seems to be the only thread that I can find up here. I'm worried if I would have the O2 sensor light up after install these? If so, is there anything I can do to prevent or solve it? Or did yours just work perfectly without any problem?
Thank you so much for your help!
|
Quote:
Originally Posted by 631twentyeighteye
You'll need a tune with catless headers to eliminate the check engine light. If you don't tune you'll have a check engine light and codes regarding o2 sensors and the catalysts.
|
Correct, you absolutely will get a SES light without a proper tune. Currently Evolve and AA both offer one.