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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...
  #110  
By Heat00 on 03-10-2008, 08:21 PM
great free mod, codes or no codes, who cares.
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  #111  
By darkphantom on 03-12-2008, 08:18 PM
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Anyone get that exhaust note vs the stock from doing this?
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  #112  
By Kalin on 03-17-2008, 03:34 AM
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I unplugged it this weekend.. this is how the car SHOULD sound all the time.
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  #113  
By Inspired on 03-25-2008, 11:54 PM
I tried it today. It seems like it is held on pretty tight? Is it suppose to be like that? Can I just yank it up? How much strength do I need exactly. PM me with response. thanks
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  #114  
By googoomas on 03-26-2008, 05:05 PM
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unhooked these on both my e90 and my brothers e92 this weekend. super pleased with the slight sound increase. really noticeable around 3k...

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  #115  
By SooBoy on 03-27-2008, 06:04 PM
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Anyone do this to their E93? Looks a lot different than the trunk on the E92 due to the top folding mechanism...
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  #116  
By thwgw24 on 03-27-2008, 08:03 PM
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Just unplug mine this afternoon at work.
It is a lot louder on the freeway.
Nice..................
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  #117  
By Appropriate on 03-27-2008, 10:08 PM
Excuse my ignorance, but it sounds like this vacuum valve basically opens up the second tailpipe when additional volumetric exhaust capacity is needed... is that right?
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  #118  
By dimisa1977 on 03-30-2008, 12:56 PM
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Quote:
Originally Posted by LaLakers91tc View Post
more ferrari-ish
sounds good, im willing to try it out
but does this work for a 330i?
i will verify this in about 2 minutes!
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  #119  
By dimisa1977 on 03-30-2008, 01:12 PM
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Quote:
Originally Posted by dimisa1977 View Post
i will verify this in about 2 minutes!
wow, that was easy, and FREE!

my 335i NOW sounds like my wife's Infiniti FX 35! I love it.
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  #120  
By googoomas on 03-31-2008, 06:42 PM
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would also like to add, sent my car into the dealer today and i forgot to plug this back in. they were in my car and and checking out codes all day. they didnt say anything to me about it and it was left unpluged. so for anyone who is worried, dont be...

*it is possible they missed it, so dont hold me responsible...
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  #121  
By Inspired on 03-31-2008, 09:52 PM
^ i really dont notice anything difference. not that great.
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  #122  
By tryangles on 04-01-2008, 11:15 AM
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Quote:
Originally Posted by Appropriate View Post
Excuse my ignorance, but it sounds like this vacuum valve basically opens up the second tailpipe when additional volumetric exhaust capacity is needed... is that right?
I wonder if this is true because that would explain why one of my tailpipes has way more carbon deposits than the other.
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  #123  
By Grizzles on 04-04-2008, 07:30 PM
i dont notice any difference except both tails smoke
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  #124  
By e92man on 04-07-2008, 07:27 PM
just did this mod on my 335i coupe. loved it. i am just worried that it will throw a code and my dealer will give me a load of crap about it. but i guess i will just plug it back in and shrug my shoulders whenever i go to the dealer
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  #125  
By OverDrive on 04-08-2008, 05:44 PM
hey guys,
this mod is awesome. thanx alot OP
I have a question, where is this cable on the E93's? I tried to do this on my friend's E93 335i and I didn't find it.
Can any one help me out here?
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  #126  
By AlpineWeiss335 on 04-11-2008, 03:01 AM
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I didn't want the car to throw codes, so I ended up doing the 'BB' Mod. I used a 6mm BB from back in the day when I used to play Airsoft. I just unplugged the hose leading to the actuator and shoved the BB inside and re-plugged the hose. Definitely notice the sound difference, especially when driving in sport-mode.
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  #127  
By lkn on 04-11-2008, 09:55 PM
I would take precaution doing this mod as another member has had the dealer find out that there is a BB inside the valve..
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  #128  
By alisayyah on 04-12-2008, 12:11 PM
It works great - just did it on my 335!
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  #129  
By roozie2001 on 04-13-2008, 05:46 AM
i just did this. definately more growl than before. any info it takes away or adds a any power??
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  #130  
By BostonRob on 04-13-2008, 08:19 PM
Quick-n-Easy - nice mod!!
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  #131  
By K330i on 04-13-2008, 10:26 PM
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Quote:
Originally Posted by Euro335i View Post
this mod only applies to a specific RPM where the drivers side exhaust flap closes during low range RPM, if u step on the throttle a little harder the exhaust flaps open, i think anything above a specific rpm lets say 3k+ the flap is always open. this mod only helps sound while crusing or coming off a light or stop sign.
and that's exactly why i did it....always sounded like something was wrong with the car cruising thru the neighborhood so i would kick it down to 2nd gear so it would go away. now it sounds normal...
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