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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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      08-28-2007, 06:14 PM   #1
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DIY: 335i Exhaust Sound Mod. Better, and even easier than golf tee mod.

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 simple, easily reversible, and doesn't involve digging under the car. Win-Win!

So a big thanks to whomever it was that clued me in... I like the sound of the dual exhaust all the time without the bypass, but I also like being able to quiet it down if I am going on a long interstate drive... So here's a Barney Style Step by step to a better exhaust sound on demand. :rocks:

--------ETA: Perform at your own risk, Myself and many others have had no ill effects, but you never really know.---------------
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Last edited by Revlis; 08-30-2007 at 03:15 PM.
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      08-28-2007, 06:16 PM   #2
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Just that freaking easy... 10-15 seconds if you take your time... No Ball bearings, no crawling under the car, just dead simple and sounds great...
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      08-28-2007, 06:29 PM   #3
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i think the ecu records this as a fault in the computer and saves it even tho it wont show up on the dash..
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      08-28-2007, 06:37 PM   #4
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Quote:
Originally Posted by miamibusta69 View Post
i think the ecu records this as a fault in the computer and saves it even tho it wont show up on the dash..
OK. Works for me, it can record it to it's silicone hearts content. I had no codes on the dash, all systems check OK. So I'd say we are good to go. it can record that fault all it wants.

My only concern would be if there was some emission device failure or something similar and it traces back to the actuator.
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      08-28-2007, 06:38 PM   #5
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Quote:
Originally Posted by miamibusta69 View Post
i think the ecu records this as a fault in the computer and saves it even tho it wont show up on the dash..
it does....so?

the 325 doesnt even have this valve, right?

i might actually give thsi a try now....

thanx for the great pics.
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      08-28-2007, 06:41 PM   #6
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Quote:
Originally Posted by Chesmu View Post
it does....so?

the 325 doesn;t even have this valve, right?
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?
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      08-28-2007, 06:41 PM   #7
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interesting...
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      08-28-2007, 06:56 PM   #8
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It will record it does it matter id say no. just wanted to make sure you knew the risks between this way and the others.. but if somthing ever happens and they check the comp it will show
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      08-28-2007, 07:01 PM   #9
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my question is do i have one on my e92 328i?
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      08-28-2007, 07:07 PM   #10
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Quote:
Originally Posted by miamibusta69 View Post
my question is do i have one on my e92 328i?
no

only 330 and 335
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      08-28-2007, 07:15 PM   #11
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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?
and 330's
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      08-28-2007, 07:15 PM   #12
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dam .. so my car is as loud as its going to get
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      08-28-2007, 07:17 PM   #13
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Quote:
Originally Posted by miamibusta69 View Post
dam .. so my car is as loud as its going to get
get a gruppe m rep intake.
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      08-28-2007, 07:18 PM   #14
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Aside from obtaining the 7/32 ball bearing, the Golf Tee mod appears faster, imo. Both, of course, are super quick. I'd prefer the clean ECU, also.

Nonetheless, thanks for the good instructions.
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      08-28-2007, 07:19 PM   #15
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i want the injen ... but they dont even knwow hen it will be released.. and bavdom intake who knows.
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      08-28-2007, 07:34 PM   #16
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Quote:
Originally Posted by mike328 View Post
nice sound on the exhaust and power gain. clips and pictures avalible on this link. pages 1-4 have clips and pictures enjoy


http://www.e90post.com/forums/showthread.php?t=79689
What does this have to do with the Gold Tee mod?
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      08-28-2007, 07:46 PM   #17
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hes shhowing me i can change my exhaust note for very cheap. kinda like a 80 dollar golf tee mod for the 328
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      08-28-2007, 07:50 PM   #18
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i used zip ties
but this seems like a good alternative also
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      08-28-2007, 09:07 PM   #19
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Quote:
Originally Posted by miamibusta69 View Post
It will record it does it matter id say no. just wanted to make sure you knew the risks between this way and the others.. but if somthing ever happens and they check the comp it will show
You know, I wonder if it'll show a code when it's done the other way? I mean it's still rendering a piece of the car NON-Functional...
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      08-28-2007, 11:31 PM   #20
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is there any bad side affects for this mod?
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      08-29-2007, 12:04 AM   #21
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Quote:
Originally Posted by Barvia SLV335XI View Post
is there any bad side affects for this mod?
the 325 and 328 don't even have this valve.
it's nothing but sound dampening.
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      08-29-2007, 12:05 AM   #22
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Quote:
Originally Posted by eleven11 View Post
What does this have to do with the Gold Tee mod?
the actuator he's unplugging controls the vacuum that controls this valve.
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