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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > DIY Guides > DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod.



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Revlis's Avatar DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod.
Revlis
08-28-2007
OK I know I am not the first to do this, someone had to clue me in, but instead of plugging, crimping, or otherwise disconnecting the vacuum line under the car, just unplug the actuator in the trunk in front of the drivers side tail light. I was a little unclear as to how this works, but it's dead...
  #132  
By Chiggy on 04-15-2008, 08:56 PM
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Quote:
Originally Posted by lkn View Post
I would take precaution doing this mod as another member has had the dealer find out that there is a BB inside the valve..
OP's mod is different than the BB method.
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  #133  
By baron on 04-16-2008, 11:26 AM
I did the mod and it didnt' really do much for me, probably because I already had my secondary cats and resonator removed. The change is very subtle and adds more drone on the freeway.
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  #134  
By raceyBMW on 04-16-2008, 02:37 PM
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I like the mod for around town, but when I go on my road trip across the country next week I will be plugging it back in.
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  #135  
By EmagdniM on 04-16-2008, 03:42 PM
Will this work on my E90 (06' 330i)?
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  #136  
By K330i on 04-16-2008, 05:57 PM
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Quote:
Originally Posted by EmagdniM View Post
Will this work on my E90 (06' 330i)?


yes....
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  #137  
By geo8523 on 04-23-2008, 01:33 AM
I just did this on my e93. This requires removal of the plastic taillight cover as well as the carpeted plastic piece on the side of the trunk. It's kind of a pain. What I did was pop out the 2 grey retainers near the top and bend the piece down to look inside. You will see the plug right there.... Kind of hard to get your hands in there.

I took it out for a spin, and noticed the tach bobbling a little bit after getting up to speed and releasing the gas, as the transmission upshifts to the highest gear. I have steptronic, obviously. I haven't read anything about this so maybe I'll give it a few days, maybe the ECU is used to dealing with backpressure and needs to relearn something.
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  #138  
By darkphantom on 05-16-2008, 05:23 PM
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Quote:
Originally Posted by geo8523 View Post
I just did this on my e93. This requires removal of the plastic taillight cover as well as the carpeted plastic piece on the side of the trunk. It's kind of a pain. What I did was pop out the 2 grey retainers near the top and bend the piece down to look inside. You will see the plug right there.... Kind of hard to get your hands in there.

I took it out for a spin, and noticed the tach bobbling a little bit after getting up to speed and releasing the gas, as the transmission upshifts to the highest gear. I have steptronic, obviously. I haven't read anything about this so maybe I'll give it a few days, maybe the ECU is used to dealing with backpressure and needs to relearn something.
tell me how this works for you, PM me, I just got my E93 and wanted to do this. Thanks!
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  #139  
By Dan335 on 05-17-2008, 05:54 PM
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E90 335 - Just did the mod

Just unplugged it and took it for a test drive - Quite honestly I didn't notice any difference and from what I think I noticed it sounded like rice. I'm going to leave it for now and give it another try but mostly like it's going to get plugged back.
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  #140  
By me92 on 05-26-2008, 07:19 PM
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Quote:
Originally Posted by Dan335 View Post
Just unplugged it and took it for a test drive - Quite honestly I didn't notice any difference and from what I think I noticed it sounded like rice. I'm going to leave it for now and give it another try but mostly like it's going to get plugged back.
mine took 4 days before it gets loud!
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  #141  
By E92Adam on 05-30-2008, 02:07 PM
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Someone requested comparitive sounds....

Stock

With Mod
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  #142  
By me92 on 05-30-2008, 02:11 PM
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Quote:
Originally Posted by E92Adam View Post
Someone requested comparitive sounds....

Stock

With Mod

what else was installed? intake? i heard very obvious turbo spoofing sound in the stock clip?
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  #143  
By E92Adam on 05-30-2008, 02:23 PM
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Straight stock, nothing else installed. Didn't move the microphone during recording, nothing.....
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  #144  
By me92 on 05-30-2008, 03:12 PM
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Quote:
Originally Posted by E92Adam View Post
Straight stock, nothing else installed. Didn't move the microphone during recording, nothing.....

where did u place the mic?
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  #145  
By Inspired on 05-30-2008, 11:20 PM
how come mine sounds nothing close to that? I have 2007 335i.
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  #146  
By e92man on 05-31-2008, 12:05 AM
ive had this on for a month and im fine. great mod!
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  #147  
By bjungx007 on 06-01-2008, 06:33 PM
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nice.
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  #148  
By TiAg335i on 06-01-2008, 07:28 PM
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Does this "mod" throw codes? Is it detrimental in any way to the exhausts backpressure?
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  #149  
By dailo on 06-29-2008, 02:26 PM
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Wow just tried this on my E92 and when starting the car up you can definitely hear the difference!
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  #150  
By me92 on 06-29-2008, 02:58 PM
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Quote:
Originally Posted by dailo View Post
Wow just tried this on my E92 and when starting the car up you can definitely hear the difference!
especially when it's cold.

i have it unplugged for 6 months now.. np at all
and it's getting louder...nice
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  #151  
By PaulBailey@ltbmw on 06-29-2008, 03:23 PM
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So not one person has experience any negative effects from this? MPG? Power? Anything???
I'm going to go try this on my 06 E90 330i right now. . .
But i don't remember seeing those wires and stuff when i installed my blacklines. . .
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  #152  
By me92 on 06-29-2008, 03:27 PM
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Quote:
Originally Posted by xPaulBaiLeyx View Post
So not one person has experience any negative effects from this? MPG? Power? Anything???
I'm going to go try this on my 06 E90 330i right now. . .
But i don't remember seeing those wires and stuff when i installed my blacklines. . .
ONLY 335 has it...
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  #153  
By PaulBailey@ltbmw on 06-29-2008, 09:21 PM
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Quote:
Originally Posted by me92 View Post
ONLY 335 has it...
Wrong. I just did it to my 2006 330i.
It has it too.
not sure i really noticed any difference at all though. . .
Seemed like nothing changed.
Does it take a while to kick in or should i notice it right away?
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