I'm in the process of making a custom exhaust for my MKIV R32 and I am trying to save some money. All my O2 sensors are dead, and the SAI does not work properly. This means I need to replace them or code them out because they currently have readiness errors. Additionally, I want to code out the rear O2 sensors so that I can go catless.

I've heard it's possible to code out the SAI and Rear O2 sensors with a program called galetto. I've also heard that there are a few ways to do the SAI code out, and one of them is harder to detect than the other. What all do I need so that I can do this? What are my options?

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I'll be leaving the front O2 sensors in. I just don't want to have to deal with the rear ones.

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