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BMW 3-Series (E90 E92) Forum
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Secondary Cat Delete
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04-06-2011, 10:29 PM | #1 |
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Secondary Cat Delete
I've been looking to get a bit more sound out of my exhaust and I noted that a muffler delete was just way too much for me. I would go catless DP's, but then I'd have issues during emissions testing.
So I was wondering what everyone felt about getting a 2nd cat delete for sound? It's gonna cost me about $135.... is it worth the cost? I searched around and the performance gains seem to be negligible. I'm just looking for a louder and deeper note to my exhaust without having to go aftermarket. |
04-06-2011, 10:31 PM | #2 |
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i wondered the same thing too, but I believe that secondary cats may also effect emission if your primary cats fail
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04-07-2011, 05:29 AM | #4 |
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Here is a thread I created which should help you decide
http://www.e90post.com/forums/showthread.php?t=509180 |
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04-07-2011, 05:33 AM | #5 |
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more response, faster and more audible turbo spool. increase in 5-10 rwhp, all for $135. whats not to like! oh right, forgot the most important factor. the sound is awesome. it now gurgles and is throatier.
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04-07-2011, 08:52 AM | #6 | |
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Quote:
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06-17-2011, 02:50 AM | #7 |
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do it!
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06-10-2012, 10:30 PM | #9 |
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ull see/smell some more smoke too
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06-10-2012, 11:28 PM | #11 |
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06-11-2012, 12:05 PM | #15 |
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I have that same setup. You will have a raspy sound right in betwen 1600/1700 to 2000 rpms. You are going to change your driving style 2000rpms and up. I have and 6mt though. Beside that you will like it.
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06-26-2012, 01:15 PM | #17 |
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Yup, nothing really noticable but I'm sure it has to be good for a few hp.
Got mine done for free pretty much. Traded the cats out for the work. Our secondary cats are worth about 80 to the junkers |
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06-26-2012, 11:35 PM | #18 |
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Check my video/thread. I just ordered res vibrant 2x well c how it sounds
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08-02-2012, 10:10 AM | #19 |
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Well after asking around a few local shops here in the good ol' state of NC ( by god). I found that it is illegal and also a felony if caught by the EPA if you remove your secondary cats.
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08-02-2012, 10:29 AM | #20 |
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yeah, most states are similar I think. Remove the exhaust first... not on the car different story. And gut them for stealth.
Last edited by Joshboody; 08-02-2012 at 10:41 AM.. |
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08-02-2012, 10:59 AM | #21 |
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I did the catless downpipes and 2nd cat delete. The car sounds great.
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