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      11-27-2012, 10:29 PM   #1
Julio Perez
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Exhaust question

Hi guys I have an 11 m3 I recently took off the secondary cats and resonator to gain more sound.. I was wondering if I could do the oem mod as well with what I've done. Is there anything I need to consider before doing this? I don't wanna lose power just to gain sound...
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      11-28-2012, 08:17 AM   #2
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The OEM mod is independent of any cat/resonator mods so no reason you cant do it. As for things to consider...the increase in volume will be substantial compared to simply removing the secondary cats and resonators with the stock rear section and the resulting sound will likely be very raspy.
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      11-28-2012, 10:29 AM   #3
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Quote:
Originally Posted by gatorfast View Post
The OEM mod is independent of any cat/resonator mods so no reason you cant do it. As for things to consider...the increase in volume will be substantial compared to simply removing the secondary cats and resonators with the stock rear section and the resulting sound will likely be very raspy.
I would like to increase sound but my worry is if it'll be too raspy that it wouldn't be worth doing it .. What do you think ?
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      11-28-2012, 11:36 AM   #4
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If you dont want rasp I would honestly put the 2nd cats and resonators back on and just do the oem mod.
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      11-28-2012, 12:21 PM   #5
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I'd bet it will be quite raspy since you'd end up having a full straight piped setup.
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      11-28-2012, 01:01 PM   #6
Julio Perez
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What about doing the oem mod and putting the resonator or secondary cats back on ?
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      11-28-2012, 01:40 PM   #7
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I'm in the same boat. I've been debating whether to remove second cat and resonator or do OEM exhaust mod. Did you not get the sound increase you were looking for with CAT removal? I'm also having issues finding a shop to do the OEM exhaust mod.
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      11-28-2012, 01:49 PM   #8
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Quote:
Originally Posted by tulsas View Post
I'm in the same boat. I've been debating whether to remove second cat and resonator or do OEM exhaust mod. Did you not get the sound increase you were looking for with CAT removal? I'm also having issues finding a shop to do the OEM exhaust mod.
There was a very noticeable increase It sounds great but I personally would like to get it even louder I don't really mind drone.. As long as its not a terrible sound
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      11-28-2012, 03:33 PM   #9
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Quote:
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What about doing the oem mod and putting the resonator or secondary cats back on ?
Thats what I suggested 2 posts above yours.
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      11-28-2012, 03:38 PM   #10
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That shiznit will make babies near by spontaneously combust...
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      11-28-2012, 10:56 PM   #11
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Can you post a video of what your car sounds like ? Would really appreciate it @gatorfast
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      11-29-2012, 08:44 AM   #12
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I just have the OEM exhaust mod and test pipes, still have rear cats and resonators and it sounds nice when you go wot, see videos. it's not deep or raspy,
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      11-29-2012, 09:52 AM   #13
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More power to you. Drone made my head spin on the P car.
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