Im interested in purchasing a downpipe, specifically the hahn, with a highflow cat. However im affraid it will set trouble codes and make the CEL come on.

Does anyone know if any dtc's will set?

What about the hahn downpipe?

all help is appreciated, thanks!!

 

I have only had one. And that was 1 week ago... after having it on for 6 months. Haven't had one since.

 

was it a cat efficiency dtc? which downpipe?

 

i have the cobalt addiction and i have never had a code.

 

I have the 2.5" Cobalt-Addiction... and yes, it was a Cat Efficiency.

 

mines 2.5 also and i have yet to see a code unless your computer is funny or some ****

 

I got no Cel when I had my High FLow cat.

 

anyone have any experience with hahn?