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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > All-Wheel-Drive (Xi / xDrive) Talk > Exhaust Note



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      04-18-2012, 10:19 PM   #1
elinstylez
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Exhaust Note

Has anyone noticed a difference between the exhaust note for the x-drive versus the i models?

I just received a loaner e93 and noticed that the exhaust note is significantly louder and more aggressive sounding than my e92 xi; I'm not sure if it has standard PE.

I'm sure our secondary cats have to do a bit with it but it is a night and day difference!
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      04-19-2012, 09:53 PM   #2
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Since when do we have secondary cats and the I doesnt? It's the same exhaust I vs xi except for the area around the transfer case?
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      04-19-2012, 10:49 PM   #3
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My 2008 335xi was much louder than my 2011 335 x-drive. I had to disconnect the actuator to get to the second exhaust to permanently stay open to get any decent sound. If i decide to buy out the lease I will be going with the PE exhaust.
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      04-19-2012, 11:43 PM   #4
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I feel like my xi is louder an I, that's just me
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      04-20-2012, 01:08 AM   #5
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dang what dealer did you go to that has E93 335i loaners??
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      04-20-2012, 07:53 AM   #6
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An i might actually be louder than an xi cause piping is different. I'm fully catless and my friend's fully catless is a bit louder. Now It's either the exhaust or piping difference. We both have ar dp's and I have AMS exhaust while he has AE. The xi ar dp are differently shaped from an i and they're not fully 3" like the i. At one point where they curve they're 2.5". Now is this the case or the exhaust??
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      04-20-2012, 09:04 AM   #7
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Thanks for the feedback; I guess it must be a subjective thing. I did speak with my service adviser after the fact and he stated that some of the loaners do come standard with PE. Based on the much throatier sound of it, I'm fairly certain it has the PE. My xi sounds muted in comparison.

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Originally Posted by VTECaddict View Post
dang what dealer did you go to that has E93 335i loaners??
New Century - I've had great service from there. They mentioned that once in awhile they have M3 loaners
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      04-20-2012, 04:45 PM   #8
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Quote:
Originally Posted by RevC View Post
Since when do we have secondary cats and the I doesnt? It's the same exhaust I vs xi except for the area around the transfer case?
I'm fairly new to the car, but according to what I've read our cars do have secondary cats, unfortunately. Not sure why...
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      04-20-2012, 11:30 PM   #9
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I hear i is louder.
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      04-21-2012, 10:56 AM   #10
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The '11 is an N55. The don't have secondary cats, and the exhaust note is completely different.
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      06-19-2012, 11:45 PM   #11
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secondary cats for xdrive..

Quote:
Originally Posted by elinstylez View Post
I'm fairly new to the car, but according to what I've read our cars do have secondary cats, unfortunately. Not sure why...

http://www.e90post.com/forums/showth...6#post12186556
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      07-12-2012, 11:21 PM   #12
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Quote:
Originally Posted by Fredz View Post
Thanks for the link. That's pretty cool. You should see gains even if it is nominal - cats are pretty restrictive. I guess there are differences in sound with the i and the xi.. I want the PE exhaust but am not willing to pay $1200+ just for sound
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