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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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      03-10-2008, 09:21 PM   #111
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great free mod, codes or no codes, who cares.
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      03-12-2008, 09:18 PM   #112
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Anyone get that exhaust note vs the stock from doing this?
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      03-17-2008, 04:34 AM   #113
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I unplugged it this weekend.. this is how the car SHOULD sound all the time.
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      03-26-2008, 12:54 AM   #114
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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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      03-26-2008, 06:05 PM   #115
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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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      03-27-2008, 07:04 PM   #116
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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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      03-27-2008, 09:03 PM   #117
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Just unplug mine this afternoon at work.
It is a lot louder on the freeway.
Nice..................
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      03-27-2008, 11:08 PM   #118
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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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      03-30-2008, 01:56 PM   #119
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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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      03-30-2008, 02:12 PM   #120
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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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      03-31-2008, 07:42 PM   #121
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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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      03-31-2008, 10:52 PM   #122
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^ i really dont notice anything difference. not that great.
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      04-01-2008, 12:15 PM   #123
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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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      04-04-2008, 08:30 PM   #124
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i dont notice any difference except both tails smoke
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      04-07-2008, 08:27 PM   #125
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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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      04-08-2008, 06:44 PM   #126
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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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      04-11-2008, 04:01 AM   #127
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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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      04-11-2008, 10:55 PM   #128
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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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      04-12-2008, 01:11 PM   #129
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It works great - just did it on my 335!
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      04-13-2008, 06:46 AM   #130
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i just did this. definately more growl than before. any info it takes away or adds a any power??
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      04-13-2008, 09:19 PM   #131
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Quick-n-Easy - nice mod!!
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      04-13-2008, 11:26 PM   #132
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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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