Hi!
I am 100% new to car mods, and as soon as I save up a few dollars, I plan on buying these. My question is, what happens if the CEL is triggered? Is there any solution to that or will I forever live with it? Also, would these theoretically improve gas mileage, make it worse, or stay the same? Could someone with no experience install these or do they have to be professionally installed?
Thank you!
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