Hello,

I recently swapped in catted Kooks 1 3/4 LTs. Prior to that
I had shorties, stock cats and y-pipe and the SLP dual dual exhaust system.
I only swapped in the Kooks LTs and the Kooks catted y-pipe, nothing
else changed. Before this change the car was tuned very well, passing
emssions with a lot of margin.

I can now smell the car runs much richer when cold (open loop)
but also richer in closed loop. When logging various data is appears
the Ltrims are a few % on the positive side (in closed loop).

I would like to lean out open loop a bit as well as closed loop.
What would be the best approach for both conditions?
Thanks,
Gert