[Tenac]

Hey all been deciding between doing some simple mods on my M8 or finding another ride to do work too keeping the M8 stock. One thing I would like to do is put higher flow cats on so the smell doesn't get me with no cats. I ran across these from Fabspeed which I buy many of my Porsche parts from, always had good products. But these claim guarantee NO CEL and wanted to see if anyone out there was running them yet or not before I bite and order.

https://www.fabspeed.com/fabspeed-bm...ownpipes-2019/

[TupperBMW]

^ I'm not sure I'd risk it. There are high flow sport cats that were "guaranteed" to be no CEL sold before by various companies, but it can be a crapshoot.

Fi Exhaust sells catted downpipes with some "dummy" O2 sensors which they say are effective at avoiding a CEL, but even they will stop short of promising no CEL