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      01-02-2014, 11:59 PM   #1
TurboM
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335i Exhaust Installed on 328i (pictures and video attached)

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I know this has been done before a few times but just figured I'd share my experience with some pictures.

Parts used:
- OEM 335 axle back exhaust/muffler
- 335i rear bumper diffuser
- OEM BMW muffler clamp (for F30 328i - 75mm)

Since the 335 piping near the muffler is 5mm larger than the 328 we needed to add a small piece of piping to the muffler side of the piping in order to use the factory 328 clamp. It was a bit tricky to align the piping due to our initial cut not being in the ideal spot. This resulted in about 30 minutes of extra fabrication work but ended up working out fine. I suppose it would be much easier just to weld everything but I needed this to be reversible (I can reinstall the 328 muffler and rear diffuser in about 15 minutes).

Overall the car sounds MUCH better. Pretty loud during cold start, and has a nice rumble during idle and normal driving conditions but not too loud at all. I also have a catless downpipe installed which I'm sure adds to it a bit.

Attached Images
      

Last edited by TurboM; 06-03-2016 at 06:34 PM.
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      01-03-2014, 12:25 AM   #2
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Looks great! This gives me hope!!

I have a 328GT that I would eventually love to have 335-style or quad tip exhaust eventually.
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      01-03-2014, 01:20 AM   #3
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How does your's sound?
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      01-03-2014, 02:25 AM   #4
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looks great!! how much did this run you?
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      01-03-2014, 02:54 AM   #5
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Nice work. Looks really good.
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      01-03-2014, 07:23 AM   #6
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Would there be any issues with putting the 35i exhaust on a 28i engine? Was thinking about doing this on an X3
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      01-03-2014, 12:56 PM   #7
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Quote:
Originally Posted by LAwolverine View Post
looks great!! how much did this run you?
Rear Diffuser - $200
335i Muffler - $85 (+ $60 shipping cost)
Muffler Clamp - $65
Welding/Labor - $120
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      01-03-2014, 01:03 PM   #8
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Quote:
Originally Posted by TurboM View Post
Rear Diffuser - $200
335i Muffler - $85 (+ $60 shipping cost)
Muffler Clamp - $65
Welding/Labor - $120
I paid 125 for my 335i muffler and i did the work myself.. saved a lot.
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      01-03-2014, 01:09 PM   #9
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Quote:
Originally Posted by TurboM View Post
Rear Diffuser - $200
335i Muffler - $85 (+ $60 shipping cost)
Muffler Clamp - $65
Welding/Labor - $120
where'd you get that diffusor for $200? i'd also like to know if there are issues with using a 335i muffler on n20/n26
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      01-03-2014, 01:09 PM   #10
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Quote:
Originally Posted by slmdgee View Post
I paid 125 for my 335i muffler and i did the work myself.. saved a lot.
Yeah, if you don't need it to be reversible you could weld the muffler to the mid pipe and also cut the factory rear diffuser. This would have cut the cost in half but was not an option for me.
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      01-03-2014, 01:11 PM   #11
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Quote:
Originally Posted by LAwolverine View Post
where'd you get that diffusor for $200? i'd also like to know if there are issues with using a 335i muffler on n20/n26
It's just a muffler. What would be the issue?

Diffuser was purchased off eBay. Looks and fit perfect.
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      01-03-2014, 01:35 PM   #12
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Quote:
Originally Posted by TurboM View Post
It's just a muffler. What would be the issue?

Diffuser was purchased off eBay. Looks and fit perfect.
You're right, i didnt think that that through haha. Looks great man! Do you remember which ebay seller it was? The only ones I've seen have international shipping for nearly $200
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      01-03-2014, 01:42 PM   #13
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Quote:
Originally Posted by LAwolverine View Post
You're right, i didnt think that that through haha. Looks great man! Do you remember which ebay seller it was? The only ones I've seen have international shipping for nearly $200
Sent you a PM
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      01-03-2014, 04:08 PM   #14
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$470 for a new exhaust and a diffuser? That's a great deal! Looks good, debadged it looks just like a 335i.
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      01-03-2014, 05:51 PM   #15
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yeah ours sound exactly the same! Good stuff.
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      01-03-2014, 07:45 PM   #16
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What did you guys do about the electronic valve? Leave it unplugged? Or just plug it in to the 328i connector?
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      01-03-2014, 07:47 PM   #17
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Quote:
Originally Posted by momo3605 View Post
What did you guys do about the electronic valve? Leave it unplugged? Or just plug it in to the 328i connector?
The 335i muffler has the exact same valve/plug.
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      01-04-2014, 12:28 AM   #18
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Quote:
Originally Posted by momo3605 View Post
What did you guys do about the electronic valve? Leave it unplugged? Or just plug it in to the 328i connector?
plugged.
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      01-07-2014, 06:05 AM   #19
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Will this fit on 320i models? I don't see why not tbh. Can safe a lot this way..
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      01-07-2014, 11:39 AM   #20
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Quote:
Originally Posted by speedyvk View Post
Will this fit on 320i models? I don't see why not tbh. Can safe a lot this way..
yes its all the same lol!
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      01-07-2014, 03:22 PM   #21
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Quote:
Originally Posted by speedyvk View Post
Will this fit on 320i models? I don't see why not tbh. Can safe a lot this way..
I believe the piping size on the 320i is a bit smaller but positioning should be the same. You will also need to figure out a different solution for the bumper as I don't believe you can replace the small diffuser section like you can for the M-Sport lines.
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      01-07-2014, 04:18 PM   #22
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sounds great, but how much is it because of the afe down pipe?
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