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      03-26-2018, 12:21 PM   #1
gabrielh
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Secondary cat delete question 2011 3.0i

Hey guys, I ordered a Remus exhaust for my 2011 sdrive 3.0i and was wondering if I should do the secondary cat delete while it's at the shop. Has anyone done it on this particular model, and if yes any feedback on how it sounds afterward?
Thanks!
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      03-27-2018, 12:02 PM   #2
E46driver
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I would recommend it personally. I had headers and exhaust on my e92 328i with a variation of the same motor in the sdrive 3.0. After I unmuffled the naturally aspirated motor it gave me a grin of unquantifiable measures. I can only imagine how much more enjoyable the motor would've been without a roof.
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      03-29-2018, 07:54 AM   #3
57type1
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gabrielh, please let us know what decision you took and how it turned out.
Thanks. I'm looking to upgrade exhaust also.
JR
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      03-29-2018, 06:39 PM   #4
rjahl
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Quote:
Originally Posted by gabrielh View Post
Hey guys, I ordered a Remus exhaust for my 2011 sdrive 3.0i and was wondering if I should do the secondary cat delete while it's at the shop. Has anyone done it on this particular model, and if yes any feedback on how it sounds afterward?
Thanks!
Have you been watching the E90 N52 threads?

Personally, I'd get the MILVs and a tune.

Either way, lots more information on the N52 over there.
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      04-10-2018, 11:05 PM   #5
RedRabbit
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I went with the Remus catback & it will sound better than stock. But then put some Supersprint headers & straight midpipes & just did away with all 4 cats and is now much better.
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      06-18-2018, 08:11 AM   #6
gabrielh
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Hey sorry, I never came back here. So I did the secondary cat delete and I'm very happy with the result. Here is a before and after video I did:



Quote:
Originally Posted by 57type1 View Post
gabrielh, please let us know what decision you took and how it turned out.
Thanks. I'm looking to upgrade exhaust also.
JR
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      07-23-2018, 10:02 PM   #7
Vetracr
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It is my understanding that you can't mess with the N52 exhaust without a reflash of the tune. Removing the cats, resonator or adding a less restrictive muffler will cause the engine to run lean. Can anyone confirm this?
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      07-28-2018, 11:47 PM   #8
taranfx
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I personally feel primary cat delete is the way to go. Here's why
1. way better exhaust sound (especially on 35i and superb on 35is)
2. few extra horsepower +20hp, even more if you're tuned
3. very minimal smell (only when cold started)

Me driving 35is around https://soundcloud.com/taranfx/bmw-z...-exhaust-noise
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