Matte black fin inserts for the factory rear diffuser on BMW M135i F20 and F21 models (2011-2015). No cutting, no drilling required - they clip cleanly over the inner edge of your existing diffuser.
Four fins + pre-applied industrial double-sided tape for fast, clean fit
Optional drill holes for extra security; fully reversible with zero OEM damage
UK-made adhesive included; same-day dispatch, free UK First Class delivery
