Finally had an excuse to upgrade to a m-tech rear.
The diffuser was painted matte black. Car looks much better now.
Fitment was 9/10 for being a replica from eBay. The 1 point deduction is because there's some residue lines from the moulding next to the wheel. I think if the body shop sanded that part down it would have been spot on. I was able to keep the existing bumper guides.
Add Ons: Charcoal Filter Delete, K&N Drop-in, Air Scoops, HID Angel Eyes, Splitters, M3 Lip Spoiler, Gloss Black Kidney Grills, Blackvue DR500-GW, M-Tech rear, BMW Performance Exhaust