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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...
  #484  
By skwongr on 11-09-2011, 11:32 PM
This is my first post, first mod and the best ever. Done 10 seconds after work and smile all the way home. Love the sound!!
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  #485  
By apocalypse on 11-16-2011, 02:27 PM
Did the mod, really easy stuff. I can hear the louder sound on start up and low revs. It does cause droning on the highway; will give it a few days and see if its going to bug me.
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  #486  
By stricklcp on 01-02-2012, 07:21 PM
Great mod! Done in less than 2 min! Thx!
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  #487  
By zapingosays on 01-06-2012, 02:17 AM
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Quote:
Originally Posted by Revlis View Post
Far as I know it does not. 335s only I think.


You know I am sure that the ECU does record this as a fault. But I wonder if it really matters?
330i as well
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  #488  
By Vesar on 01-06-2012, 10:03 AM
Can i do this to my e92 320i?
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  #489  
By DESMO748 on 01-14-2012, 08:00 PM
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Stock 2008 E90 335i Sport. Definite change in exhaust note during cold start-up and heavy acceleration. Took it for a 100+ mile drive today--no warning lights; no issues. Likes.
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  #490  
By Prablem_Child on 01-17-2012, 06:12 PM
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did it to my 2008 stock e90 335xi today im loving the sound
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  #491  
By Bmwnsxr on 01-18-2012, 08:16 AM
This sounds great but has anybody had any problem during emission test? I would love to do it also to my new 335xi, but just concern about harming the engine and failing the emissions. Please let me know If i am over thinking this. Thanks guys
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  #492  
By deadmn1337 on 01-18-2012, 01:38 PM
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Quote:
Originally Posted by Bmwnsxr View Post
This sounds great but has anybody had any problem during emission test? I would love to do it also to my new 335xi, but just concern about harming the engine and failing the emissions. Please let me know If i am over thinking this. Thanks guys
i have had this done on my car for 2 years now approx. No problems to the engine or anything yet. Havent had to do an emission test yet but its so easy that if you are worried you can plug it back in with no problems.
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  #493  
By Bmwnsxr on 01-18-2012, 02:11 PM
Thanks for the reassurance. I will do this also.
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  #494  
By Prablem_Child on 01-18-2012, 07:59 PM
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Quote:
Originally Posted by deadmn1337 View Post
i have had this done on my car for 2 years now approx. No problems to the engine or anything yet. Havent had to do an emission test yet but its so easy that if you are worried you can plug it back in with no problems.
+1
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  #495  
By Bmwnsxr on 01-18-2012, 08:18 PM
Did do something wrong? I unplugged it and start the car and sounds the same. Hmmmm. Did I skip a step?
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  #496  
By deadmn1337 on 01-19-2012, 12:50 PM
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was your car cold?
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  #497  
By Bmwnsxr on 01-19-2012, 06:17 PM
Quote:
Originally Posted by deadmn1337
was your car cold?
Yea It was probably 40 degree. Will that make a difference?
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  #498  
By a10033208 on 01-19-2012, 11:42 PM
is it fit the e93 335i??
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  #499  
By deadmn1337 on 01-20-2012, 04:08 PM
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[quote=Bmwnsxr;11183596]Yea It was probably 40 degree. Will that make a difference?[/QUOTE
the mod basically makes your car use both exhaust pipes at start up instead of closing one. So from a cold start your car will sound louder but in general it doesn't really make a big sound difference while driving when the car is warmed up. It isn't a very big difference but its there.
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  #500  
By Hartge on 01-23-2012, 05:16 PM
hmm interesting
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  #501  
By DESMO748 on 01-23-2012, 05:20 PM
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Quote:
Originally Posted by DESMO748 View Post
Stock 2008 E90 335i Sport. Definite change in exhaust note during cold start-up and heavy acceleration. Took it for a 100+ mile drive today--no warning lights; no issues. Likes.
Still no issues. Still sounds great.
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  #502  
By ArsE92 on 01-29-2012, 03:58 PM
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Just done this, thanks guys. Really easy to do, even in the dark.

Looking forward to the drive to work in the morning!
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  #503  
By Josh5442 on 01-30-2012, 04:54 PM
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Just did it on my n55 e92 335i....haven't driven it yet - cold start video.

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  #504  
By Abenitez on 02-09-2012, 10:39 PM
Any long term issues? I had a 335i and when I did this, I felt as if the reaction of the car slowed down. Just my $0.02. Anyone else?
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  #505  
By austin335i on 02-10-2012, 07:56 PM
The dealer will see that you did this (not that they care) but it throws a code with EGR or something like that. Just shows that it is malfunctioning, though you won't have a CEL of any sort.

I actually appreciate the quiet start and if all our cars had this mod done from the factory, I'd be the first to reverse. Maybe I'm getting old :P
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