Header = engine check light

[ken46]

Hi guys,
Got a question to enquire about..If i were to replace to an aftermarket header. Will engine checklight appear? As O2 sensor before and after the catalytic converter will have diff reading after replacing parts. Any sifu out there can clarify this with me?
Thanks alot in advance!
HAPPY NEW YEAR GUYS

Regards
Ken.

 

[duh!]

Re: Header = engine check light

E46 Supersprint Replica Headers from Ebay - All you need to know

This is what I found dude... a little late though I think... lol