Hey guys so I'm trying to find a high flow catalytic converter for my '16 Clubman S. I have the Remus Sport Exhaust (valve open, no controller) and recently upgraded to Wagner IC, mQuebed DP, and tune. Now that all the new pipe smell is gone, I still get whiffs of exhaust fumes. I'm terribly sensitive to smells and get headaches easily, and so I want to get a performance cat installed. Piping is 70mm or 2.75".

Mario(kart) originally recommended a 200 cell cat. His go to brand is GESI. I haven't executed on this and just want to see if anyone else has any recommendations or experience with any high flow cats since I don't know anything 🤷

 

In case anyone is interested in the topic, I ended up ordering a Vibrant GESI 7530. I was trying to order it from Amazon from a couple of different sellers, but it seems that they just didn't let the item ship to California. I ended up placing my order on THMotorsports and even saved a few bucks.

I will post an update when I receive it and get it installed.

 

I am familiar with GESI and they appear to make a good product.

 

My local muffler shop installed it for me. And now there is no smell! Mission accomplished team

 

 

Overall the sound is about the same, but the volume has decreased slightly. Power is not affected either.

If you are tired of the smell, this is definitely the way to go. Mario has the same one installed on his Audi RS7, which is why I ended up getting right when he did his.

 

 

I like to drive with my windows down. And (un)fortunately I live in SoCal so I sit in a lot of traffic. The smell of exhaust was becoming unbearable. I know others also mention that it doesn't smell so much, so maybe I'm just extra sensitive.

Before, even with the windows up and air on recirculate, the car automatically changes back to fresh air after some time. And boom! All of that exhaust smell gets blasted into my face.

 

I'd just go with the Milltek Downpipe as it has a highflow cat and will fit perfect.
https://www.waymotorworks.com/millte...-cooper-s.html

 

That one is kinda lame since it is known to throw the CEL, and because it would require an ECU remap to get rid of. You'd think that they would have taken care of that by now.

The best choice, with no CEL, is to go for the ceramic coated mquebed downpipe + high flow cat for the same price. It would be even cheaper without the coating. ECU tuning in this situation is a bonus instead of a requirement.