I went the 'OEM' kind of look after looking at lots and lots of (IMO) nasty aftermarkets...
These have a nice concave on them in real life... have a nice anthracite back and polished front...
I've never seen them on an e92, so not sure what they would look like... just putting forward an option
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Monaco Blue 320d, iDrive, 18" M3 Reps, M3 Front Bumper & Lip Spoiler, ///M steering wheel & gear knob, F&R Tints, BMW Performance Kidneys