bumpnzx3

Not sure if this is the case on other models, however what I (as well as my exhaust guy) thought were a set of secondary cats on my '06 C230- are actually a set of bullet mufflers/resonators. They aren't cats at all- the inside looks just the same as any resonator (just perforated stainless).

Although I loved the way my current exhaust setup sounded, I was curious what it would sound like if I ditched the "secondary cats". I figured if I didn't like it, I could have them put back on. I absolutely love the sound. It really didn't get any louder with the secondaries off, it just changed the pitch.

Just wanted to pass this along to anyone wanting to delete them, but was worried about emissions. Turns out, it has nothing to do with emissions.

Ryanr317

I'm not worried about emissions as i live in FL but i was worried about it smelling. I wonder if the case is the same on the earlier models like mine.

bumpnzx3

i can check the part numbers that were etched in mine if you would like, that way you know. i would venture a guess that if there's no o2 sensor downstream of the secondary "cats", that they aren't actually "cats".

i had it out today for a little bit. still loving the sound.

dblock2151

Anthuny_85 (sp?) took out his resonator and "secondary cats" when he put his Eisenmann Sport exhaust on. It sounds pretty damn good, and I believe it made his exhaust a little raspier as well. Oh, and he has the same engine as us.

AzCamel

does anyone how much louder if any if you just delete the resonators off a c320 will make.