07-24-2023, 03:17 PM | #1 |
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Help with diffuser to fit Remus CF tips
Hey there,
So I’ve been actively searching for a new diffuser before my Remus catback exhaust lands. I’ve emailed numerous parts distributors trying to ensure fitment prior to install. My tips are 4” each (102mm) and I’ve been told that I need a 10” opening in diffuser to fit these tips. My preference is an aggressive looking m5 style type diffuser. The problem is that a lot of these companies are foreign and have either not understood my question or just not being willing to open the package to measure. Can anyone help provide links to diffusers that have known measurements for or that are installed with Remus CF tips (or comparable sizes tips). Several of these companies have given very unhelpful answers or refuse to do returns in the event of fitment issues. I just want to have a new diffuser ready to go that will fit so I can slap it on when I install the new exhaust. |
07-24-2023, 04:37 PM | #2 |
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My understanding between pre-LCI and LCI is that the latter has a wider top to the exhaust, more rectangular shape than curved, which causes diffusers to have 8-10” openings instead of 6” or so on pre-LCI.
Although I just got the LCI version of RW Carbons diffuser, and I’m a little worried the exhaust still won’t fit. Here’s measurements: |
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maDjzo861.50 Daniels1117194.50 |
07-24-2023, 04:46 PM | #3 |
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If it’s not very clear, it’s about 9” bottom and tapers gradually to 7” on top. Middle measures about 8”.
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Daniels1117194.50 |
07-24-2023, 04:57 PM | #4 |
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That’s super helpful to a few looking into diffusers for their Remus exhaust. Specifically Daniels1117 with his CF titanium tips. That’s the LCI RWS style correct? From those measurements the titanium tips will not fit.
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Daniels1117194.50 |
07-24-2023, 05:10 PM | #5 | |
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I spoke to Rw and they told me that I would still likely have to trim the diffuser to get the CF tips to fit correctly. Keep this in mind when ordering. I’m having a very hard time gettin straight answers with actual measurements from many of the companies I’ve been communicating with. |
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07-24-2023, 05:16 PM | #6 | |
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07-24-2023, 05:23 PM | #7 |
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8 1/4
I guess if the opening is 9” they will fit, might be a bit tighter than mine. My diffusers opening is 9 1/4, was advertised as 10”. |
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Daniels1117194.50 |
07-24-2023, 05:25 PM | #8 |
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07-24-2023, 05:46 PM | #10 | |
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07-24-2023, 06:24 PM | #11 |
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Here is 2021-2023 BMW G30 G31 LCI 5 Series M550i MP Style Type 2 Rear Diffuser from Ikon Motorworks:
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Daniels1117194.50 |
07-24-2023, 06:27 PM | #12 |
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Here’s eBay SKRacing 2017-2022 BMW G30 M550i Carbon Fiber Style Rear Bumper Diffuser Lip Spoiler (note- does not fit 2021+ m550i as advertised):
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Daniels1117194.50 |
07-24-2023, 07:02 PM | #13 | |
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It’s hard to tell without having the product in my hand! |
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Graaf_Autowerks364.00 |
07-24-2023, 07:04 PM | #14 |
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07-24-2023, 07:40 PM | #15 |
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SKRacing one is by far the smallest of the 3.
I think you’ll need an LCI compatible diffuser for your exhaust, even if you don’t have the LCI M550i. At least that’s how it appears from the exhaust dimensions shared here. |
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Daniels1117194.50 |
07-24-2023, 07:44 PM | #16 |
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[QUOTE="Graaf_Autowerks;30337489"]SKRacing one is by far the smallest of the 3.
I think you’ll need an LCI compatible diffuser for your exhaust, even if you don’t have the LCI M550i. At least that’s how it appears from the exhaust dimensions shared here. I DO have an LCI m550. It’s a 2022. |
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07-24-2023, 07:49 PM | #17 |
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Ah then you’re in the same trap as I am. We don’t have many options. Most of the advertised ones are incorrectly listed as applying to both pre-LCI and LCI years.
Reality is we have Karbel, RW Carbon, and the Bimmerplug one for carbon fiber options. We have Ikon and a few eBay non-carbon options that appear to be ikon knockoffs that work. I wanted carbon fiber, and of the 3 options I felt RW was best. Something to note, I asked Matt at RW carbon if they were releasing new styles anytime soon. He mentioned it was possible we see one new compatible style by end of this year. |
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Daniels1117194.50 |
07-24-2023, 07:52 PM | #18 | |
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07-24-2023, 07:55 PM | #19 | |
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Not sure how I feel about having to take a dremel to a ~$1k diffuser. When are you doing your exhaust install? |
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Graaf_Autowerks364.00 |
07-24-2023, 07:59 PM | #20 | |
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My exhaust is on back order so not sure when it will be installed. For now I will have stock exhaust tips. |
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Daniels1117194.50 |
07-24-2023, 08:00 PM | #21 |
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Daniels1117194.50 |
07-25-2023, 11:12 PM | #22 | |
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Found this one today on eBay. Wrote to manufacturer to get sizing details. |
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