High flow cats suggestions
I would try the #94136 version, it has the O2 sensor mount to it like OEM. If a CEL appears after while, you can either do the Gotts O2 mod or remove it overall via custom tuning.
Do they make a performance/audible difference? Cause some models are quieter than others and more restrictive
Performance difference no, OEM is just fine. Audible, very much so. Will have a noticeable sound increase.



