Downpipe Related, ways to prevent CEL?
Ok guy's for the time being im not going to purchase a Downpipe, im just going to try and modify the CATs in the Standard one.
Correct me if im wrong but the second CAT (further away from Turbo) isn't monitered by a O2 Sensor, and if i remove with a Race Pipe shouldn't cause a CEL?
I know 'grey alex' premhk has done this and he hasn't got a CEL so im sure that well work.
As for the First Cat, i dont wanna run catless but if i get an exhuast shop to replace with a 100CPI or a 150CPI car what are the risks of receiving a CEL? I know the BM downpipes has a 100CPI CAT at the end of it and that guaranteed no CEL.
Question is what do i have to do if i want to replace the first cat with a better flowing one and not receive a CEL?
All help is appreciated