[Jethrow]

Thanks everyone.

Yes I was tested at the Jag place, I know what you are thinking about them ...

Anyway, so during the test My AFR was 14.9 (according to their sensor), so perhaps very slightly lean. But I would think it would be around the right number. My NOx registered at 140 odd ppm, whilst the Hexane was just 3 ppm. Also I understand what was said about cats not causing NOx above, and whilst yes that is true, it is also true that the job of the cats is to remove the NOx. All engines make NOx, the cats are there to scrub it. But yes, a poorly tuned engine will make too much NOx, more than the cats can handle.

Albany, which OE cats did you fit, ie from which model of Holden?

Thanks