I have a CTSC /w AC and HKS Hi Power exhaust. If I add a berk high flow cat, do I need to retune, or anything of the sort? I'm using the stock Comptech kit (no engine management) which IIRC just had some sort of rising rate hack to manage AF ratios. It's been a while since I looked at this stuff at all, so I'm a bit foggy on the details.

 

I think you should be OK

 

Yeah, that won't make enough difference to mater unless you have a terrible feedback loop.

Have you checked your AFR's?

 

Thanks. I haven't checked my AFRs in a VERY long time..

 

From my exp, I also have a ctsc w/ ac and after installing my asura hfc, my afr was slightly leaner. I have a wideband installed so it was easy to adjust it back to what it was before.