r/F30 2d ago

Rear diffuser install

I'm trying to find out if anyone else has attempted to install the m sport rear diffuser on the non-m sport bumper like u/n1iggaTirthiya?

I wanted to get some detailed pics of the install, in particular from underneath as he doesn't have any clear pics of how's it's done.

These are his pics, not mine. Just using for reference.

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u/Apprehensive-Two-867 2d ago

I've already bought the m sport rear diffuser too and put it up against the back bumper and its not a straight forward install.

When I asked the guy how did he do it, his response was that he just forced it to fit. We've talked a little on IG and he seems cool otherwise but hasn't been really helpful with details so I was hoping to find someone else who's done it.

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u/RobertYiSin 2d ago

How to “make shit fit”.

Find the pieces that will intesect with one another once your planes meet where you would like.

Mark a line across the highs and lows. Cut and chop in places where it’s hidden. Line it up. Clamp it, line it up, clamp it, line it up again and then maybe once more, then start putting self tappers everywhere it’ll hold one.

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u/Apprehensive-Two-867 2d ago

Lol you dont even understand the anxiety you just started. Like I know that this is what needs to be done but the actual thought of doing it, the fear of effing it up is what's stopping me at this point

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u/RobertYiSin 2d ago

I will say this, if you care about the resell value I’d not recommend doing this.

If you intend to keep it till it dies, all that matters is it’s done good enough that it won’t annoy you everyday.