In that case,
Get the perf spoiler. I think jbspeed makes a rep with high kick. In fact there are a few for sale in the classifieds right now. Or get OEM.
M3 Edition Grilles|Painted Reflectors|Matte Black Vinyl Window Trim|M3 Lip Spoiler|35% Tint|19" Satin Black Avant Garde M359|Lux H8 V3
OEM Aero Lip|M3 Side Skirts|LCI Tails|M-tech Rear|Duke Dynamics CF Performance|Cyba 4.0 Black Chrome