[jeffb006]

Like the balance of the dual exhaust - getting ready to buy a diffuser and if I could somehow retro fit 435/440 muffler on to my 430 single side, I could get a regular diffuser instead of the single left exit one

assume someone has tried this?

[Gen13 F36]

If your talking about the axle back section only then they will fit... that if you have the diffuser to match.

[ak7500]

Originally Posted by jeffb006

Like the balance of the dual exhaust - getting ready to buy a diffuser and if I could somehow retro fit 435/440 muffler on to my 430 single side, I could get a regular diffuser instead of the single left exit one

assume someone has tried this?

Hey buddy, yeah I did this on my 428. I had the stock muffler replaced with a 335 muffler and picked up some BMS tips and had it welded at a local shop. Did the same as you and picked up the dual exhaust diffuser and love the way it looks!

[jeffb006]

Awesome. Any pics?

[drivethrurecfan]

Originally Posted by Gen13 F36

If your talking about the axle back section only then they will fit... that if you have the diffuser to match.

Does it depend on whether the car is LCI? For example can I put a dual exit exhaust from an N55 335i on my B46 330i or must it come from a 340i?

Thanks in advance!

[Gen13 F36]

Originally Posted by drivethrurecfan

Does it depend on whether the car is LCI? For example can I put a dual exit exhaust from an N55 335i on my B46 330i or must it come from a 340i?

Thanks in advance!

My research for my own conversion on my 2016 428i GC got me to this PN # 18308650847
That part number is for F30 from 2014 - 2019 rear section exhaust according to realoem.com

I have it for a month with parts donated by a friend but I want more sound so I end up running AWE.

BTW... don't get the early producr 335i exhaust 2013.... the hanger is a little short in the newer car. They probably made changes to the hanger location... unless you have time to weld an extension then best this is avoided.

GL.

Note: there is a thread here about this conversion.

[atanatos]

Originally Posted by jeffb006

Like the balance of the dual exhaust - getting ready to buy a diffuser and if I could somehow retro fit 435/440 muffler on to my 430 single side, I could get a regular diffuser instead of the single left exit one

assume someone has tried this?

I did mine.
I'm going to order m sport bumper for my car soon but in the meantime this will do.

[jeffb006]

Originally Posted by atanatos

I did mine.
I'm going to order m sport bumper for my car soon but in the meantime this will do.

Looks great - my plan is to get a CF diffuser that will acecpt the dual tips on each side.

[kahnfucious]

Originally Posted by jeffb006

Like the balance of the dual exhaust - getting ready to buy a diffuser and if I could somehow retro fit 435/440 muffler on to my 430 single side, I could get a regular diffuser instead of the single left exit one

assume someone has tried this?

I did this mod on my 2016 - used the AA exhaust for a 335i and I was able to bolt it all together. Having a shop weld it would have been simple but COVID you know...

Here is a link go my DIY video

POV video:

I ended up going back and retrofitting the exhaust valve onto it as well:

[mechamanz]

Did mine last week.
Had a 340i Catback system fitted to my 320i (b48). The interface to the Cat was slightly different so stock exhaust was cut just rearward of the connection to the Cat and then the 340i system was just welded on. Looks and sounds amazing for relatively low cost.

[ak7500]

Originally Posted by jeffb006

Awesome. Any pics?

Hey sorry man don't have any pics rn because I didn't take any of the car with the single side exhaust (or can't find any rn haha)

But check this thread out. Lots of people on this site have done it before

https://f30.bimmerpost.com/forums/sh....php?t=1046748

What I did was purchased a

-335i muffler ($70) without tips
-435i dual tip diffuser from ebay (<$150) (side note: i think you need to have a M Sport car for this) or you can get one that fits your line
-BMS tips ($50)

Then when I took the car to a local welder around me, the process I followed was

1) remove old diffuser
2) cut off old muffler
3) install new diffuser
4) attach BMS tips
5) weld new muffler

Definitely worth it!

[jeffb006]

awesome thanks everyone - grabbed the 3d design quad tip diffuser and just waiting on the 440 muffler to get here

[Gen13 F36]

Originally Posted by jeffb006

awesome thanks everyone - grabbed the 3d design quad tip diffuser and just waiting on the 440 muffler to get here

Quad tip diffuser?

440 exhaust has single tip dual side exit. I'm guessing you want a big exhaust tip to fill it out😏

[jeffb006]

Originally Posted by Gen13 F36

Quad tip diffuser?

440 exhaust has single tip dual side exit. I'm guessing you want a big exhaust tip to fill it out😏

https://www.turnermotorsport.com/p-5...iffuser-4-tip/

thats the one I got - looking to basically do the exact same thing as that picture

[jeffb006]

Anyone know where to find the dual tips for each side? BMS that was mentioned is just single tip on each side

[WaleeF30]

Or you can have your exhaust shop put a Y pipe and no muffler

P.S. just seen that you're waiting for the 440 muffler but hey a muffler delete is always an option lol

[jeffb006]

its a daily driver so I would prefer quieter ha really making the changes for aesthetics

[jeffb006]

will post pics of mine this week - 3D quad tip diffuser coming Monday, bringing to Lou's custom exhuast right afterwards. looking forward to the results!

[Gen13 F36]

Waiting for

[jeffb006]

as promised!

3D Design Quad Diffuser - $600

435i exhaust - $150 (although I thought I bought the right one, it needed modification; so big thanks to Cody at Lou's Custom Exhaust in Marlboro, MA!)

Shop labor (cut old muffler off, add new one, weld quad tips)- $600

purrs like a kitten still and looks fantastic! Debating on whether to paint the diffuser on the left and right side adn just leave the fins CF. Not sure yet

[jeffb006]

wow that picture sucks haha - I will take a better one in the sun tomorrow - didnt realize how bad it was. it looks great in the light ha

[eff32fl]

Originally Posted by jeffb006

as promised!

3D Design Quad Diffuser - $600

435i exhaust - $150 (although I thought I bought the right one, it needed modification; so big thanks to Cody at Lou's Custom Exhaust in Marlboro, MA!)

Shop labor (cut old muffler off, add new one, weld quad tips)- $600

purrs like a kitten still and looks fantastic! Debating on whether to paint the diffuser on the left and right side adn just leave the fins CF. Not sure yet

Looking good! Can you take some video showing what it sounds like after the switch? Which 435i exhaust did you use? I have a 430i that I'd like to do the same. Thanks in advance!