UPDATED EXHAUST !
Just got my resonator and second cats deleted about 2 days ago.
For those looking to do this I highly recommend it. For the first day sound difference will be minimal, it will be about the 3rd day youll really hear the change, and boy is it music to my ears! IMO it could be louder

I dont think there are any power gains but definitely better throttle response specially in the high rpm's..
some pics:



I have to laugh at myself
with my mini cell phone shoots 
I actually thought this pic was cool if u notice there was a car passing by on the street..
the M271 C230k doesn't have a resonator. only a primary and a secondary.
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I will be making a video soon but when its done breakin in, shes still getting grumpier

hands down today was my favorite commute to work
Last edited by 97W202; Sep 16, 2010 at 01:57 PM.
I am sure some have gotten the same mod for much cheaper but there's a shop I rather pay a little extra and keep my bussiness with.
whatever I can do to get the throatiest sound possible.
perhaps deleting the second cats will unlock some more throat that I seek, as its borderline a little too monotone right now. i want to hear more rumble...

Also i got back from the shop i was asking how much it would cost to remove sec cats he said it was illegal but he would still do it for 45 bucks and 35 for the res
have a part number and it comes up at catalyc converter
but anyway did u do it ?!
hows it sound?!!

Also i got back from the shop i was asking how much it would cost to remove sec cats he said it was illegal but he would still do it for 45 bucks and 35 for the res
and about the secondary cats... iono the guy doing my muffler didn't want to take off those secondary cats cause of it being illegal but did it anyways but later when he was looking at it, he said they were basically resonators and not cats =/ hmmm.... but aither way i got it straight piped from the primary cats!
its not loud enough yet but wait a couple of days!
I love how mine sounds cuz I always tke it into that rpm range, but I am manual so its a little more fun
my car and getting to that rpm range as well... it's like that noise was the missing part of my car's soul






