Fits the following vehicles. BMW 1 Series F20 F21. BMW 3 Series F30 F31 F34 F35. BMW 4 Series F32 F33. BMW 5 Series F10. BMW 6 Series F12 F13. ESOTERIC CONE Composite cone using paper, and wood fibres for a lightweight and rigid cone producing a natural vocal reproduction. NEODYMIUM MOTOR All drivers feature powerful neodymium motors which deliver maximum magnetic force with shallow installation depth. SHALLOW SUBWOOFER Custom tooled 8 inch subwoofer directly replaces the under seat installed factory speakers delivering improved bass performance.