Any update on this project?

 

I got the idea from you guys and order dmh cutouts and did the project on my car with 4" cutouts.
it sounds really loud i will post a link with the video soon on red tube
the problem i have is i removed a piece of the cat.conv.as you see on the picture (I had to take off the exhaust to do that i tried with the exhaust on but no luck!)and recommend dont try with exhaust on,
so my CEL came on
i dont know if is any way to fix the problem
I disconnected the battery and reset the ecu but after i started the car 15 minutes later the cel came on again
any idea ecxept reinstall another exhaust to fix the cel?
by the way codes are for the oxygene sensor

 

I have an FVD tune on my turbo so the CEL for no cats is already turned off. You can use O2 "defoulers" to prevent the code from coming on.

 

where do i get the 02 defoulers and where you install those?