NO, the e92 spoilers OR trunk will not fit on the E93... they have different lines and is slightly curved.
i found this one @ jl motoring
duke dynamics also makes a spoiler, as well as a trunk.. hope this helps
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E93 ///M3
Mods: Tints|Arkym Lip|3D-Design Diffuser|IND Gloss Black Grills, Gills & Badge|Trim Wrap|MS Stud Kit|AE Performance Exhaust|RPI Mid Pipes Catless|RPI Scoops|BMC Filter|MS Pully|V1|Evolve-R Tune|KW Sleeve Kit|VMR V710|CSL Carbon Trunk
Future Mods: BBK|Vented Hood