230i LCI to M240i LCI exhaust conversion

Clear_Blue22 · 12-09-2018, 10:53 AM

This post is covered else where for the 228i to 235i exhaust, but this is slightly different. I couldn't find anyone else who had tried on the newer LCI models, so I decided to give it a shot. I picked up a performance diffuser online and had it painted locally. For the exhaust I went with the M240i free flow Dinan exhaust.

I have a local tech, Bavarian Motor works out of Enterprise, AL, who's absolutely fantastic with my car. I trust him more than I trust myself, so it was an easy choice to have him do the install.

Where this mod differed from what I read about the 228 to 235 swap, was the piping. Previously an adapter was needed go from 75mm to 80mm stepping up to the 235 muffler piping. On the LCI the piping is the same diameter for both the 230 and 240. This mean the exhaust is completely interchangeable so long as you also change out the diffuser. The hangers lined up perfectly and the included clamp worked without issue. The only issue I had at all was the exhaust tip on the right side seems to be welded a little crooked, so I'll be needing to get that fixed at an exhaust shop at some point.

The exhaust note is amazing. Deep rumbles at idle, a solid hum under hard acceleration, and near stock silence once you shift to 6th and sustain speed. It's not obnoxious, but you can also finally hear it clearly.

I compared for months between the 230 and 240. Obviously I decided on the 230, but one of the cons that really bugged me was the lack of symmetry with the exhaust. When I decided I wanted to upgrade the exhaust, it made sense to correct that issue while spending the money for the upgrade anyway.

ManuelG2 · 05-20-2019, 02:55 PM

Hello i am currently in the process of making this upgrade on my 2016 228i, is the difference in pipe size on lci due to 230i pipe size increasing or m240i size decreasing?

Thanks again! this is particularly relevant to me because i have both an m235i and an m240i muffler for sale near me locally and am wondering if i should be choosing one over the other.

Clear_Blue22 · 05-21-2019, 12:12 PM

The LCI models have the same pipe size at 80mm diameter for both the 230 and 240 models. The pre LCI the 228/230 have 75mm diameter pipes and the 235/240 has 80mm. The thread that I originally came across that I based this mod on was someone using a 228i. The only difference that you will have to do that I didn't, is you will have to get an adapter ordered or locally made to step up from 75-80mm

kennethvd1997 · 10-08-2020, 05:54 AM

how is the diameter on a 220i cause it is stil the b48 engine?

12-09-2018, 10:53 AM	#1
Clear_Blue22 Second Lieutenant 124 Rep 277 Posts Drives: 2018 230i MSport Join Date: Jul 2017 Location: Alabama iTrader: (0) Garage List 2018 BMW 230i [0.00]	This post is covered else where for the 228i to 235i exhaust, but this is slightly different. I couldn't find anyone else who had tried on the newer LCI models, so I decided to give it a shot. I picked up a performance diffuser online and had it painted locally. For the exhaust I went with the M240i free flow Dinan exhaust. I have a local tech, Bavarian Motor works out of Enterprise, AL, who's absolutely fantastic with my car. I trust him more than I trust myself, so it was an easy choice to have him do the install. Where this mod differed from what I read about the 228 to 235 swap, was the piping. Previously an adapter was needed go from 75mm to 80mm stepping up to the 235 muffler piping. On the LCI the piping is the same diameter for both the 230 and 240. This mean the exhaust is completely interchangeable so long as you also change out the diffuser. The hangers lined up perfectly and the included clamp worked without issue. The only issue I had at all was the exhaust tip on the right side seems to be welded a little crooked, so I'll be needing to get that fixed at an exhaust shop at some point. The exhaust note is amazing. Deep rumbles at idle, a solid hum under hard acceleration, and near stock silence once you shift to 6th and sustain speed. It's not obnoxious, but you can also finally hear it clearly. I compared for months between the 230 and 240. Obviously I decided on the 230, but one of the cons that really bugged me was the lack of symmetry with the exhaust. When I decided I wanted to upgrade the exhaust, it made sense to correct that issue while spending the money for the upgrade anyway. Attached Images
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05-20-2019, 02:55 PM	#2
ManuelG2 Registered 0 Rep 4 Posts Drives: 2016 Estoril Blue 228i Join Date: Jan 2019 Location: Inland Empire Ca iTrader: (0)	Piping size difference Hello i am currently in the process of making this upgrade on my 2016 228i, is the difference in pipe size on lci due to 230i pipe size increasing or m240i size decreasing? Thanks again! this is particularly relevant to me because i have both an m235i and an m240i muffler for sale near me locally and am wondering if i should be choosing one over the other.
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05-21-2019, 12:12 PM	#3
Clear_Blue22 Second Lieutenant 124 Rep 277 Posts Drives: 2018 230i MSport Join Date: Jul 2017 Location: Alabama iTrader: (0) Garage List 2018 BMW 230i [0.00]	The LCI models have the same pipe size at 80mm diameter for both the 230 and 240 models. The pre LCI the 228/230 have 75mm diameter pipes and the 235/240 has 80mm. The thread that I originally came across that I based this mod on was someone using a 228i. The only difference that you will have to do that I didn't, is you will have to get an adapter ordered or locally made to step up from 75-80mm
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10-08-2020, 05:54 AM	#4
kennethvd1997 Registered 0 Rep 1 Posts Drives: bmw 220i Join Date: Oct 2020 Location: belgium iTrader: (0)	how is the diameter on a 220i cause it is stil the b48 engine?
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