Update, just got an email back with some good info.
Kyle
The issue is the sensors are set up to read from specific cylinders
With the F10 M5 manifolds, it makes it so that some cylinders are the wrong cylinders for each o2 sensor. The AFR jumps around because the ECU's try to making changes but it gives the opposite effect.
We have never attempted to put the F10 manifolds on a N63 engine. While it may be possible to find and change the settings in the ECU's we have not attempted it and do not know for sure if it is or is not possible.
There is nothing you can do mechanically that will make it work right aside from going back to the N63 manifold. It is all software settings inside the ECU programming.
Does anyone think they might have an idea whether or not this is possible? I’m really hoping to not have to go back to stock :/
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