Do the CE high flow cats have the honey comb inside to? Is it better than the Random high flow cat? My factory cat got damaged so I bought a Random Technology high flow cat and got the infamous p0138 code along with the rotten egg smell. I ended up replacing the o2 sensor (bank1 rear ). I reset the ECU now the car is sputtering when idleing like it wants to die out, and the smell is very strong. No code yet but I know it coming. I'm afraid I have to get another cat. I've read some of the other 5th genners went with the CE or Warpspeed high flow cats. I don't want to end up with another faulty cat where the honey comb breaks off causing additional problems.

 

I have had no problems with mine.