- Genesis G70
Are the downpipes with the hfc safe? I saw people had talked about oil getting through or something? Whats all that about? Also hope your turbo progress is going well.Antifoulers prevent the CEL o2 sensor code. It fools the secondary O2 sensors into thinking your catalytic converters are operating normally.
These are useful when using HFC's, or removing the cat altogether. Even though HFC's usually prevent an o2 code from happening, it is still not as efficient as the stock cats, and on certain occasions it could still throw an o2 sensor code. The antifoulers eliminate that completely.