Review on Enhance Your Vehicle's Performance with Alpha Racing Air Vortex Generator Diffuser Shark Fin 10pcs Set Kit - Compatible with Spoiler Roof Wing Pointed End Style Carbon Fiber Pattern by Tim Paolucci

Great buy! Installation = 4 inch clearance - just before the end of the roof and the start of the slope - the last 4 inches of the roof. IMPORTANT --- install 15*offset from centerline - each side faces front to centerline. EXCEPT outside point on each side parallel to center line (straight on). Less than 3 inches apart = vortices cancel each other out without interfering with the next. Over 6 inches and not used by VGs due to the undisturbed linear airflow between them. An offset of 12-18* is acceptable. Search = "Drag Reduction Study with Vortex Generators" BONUS = with notched fin = 2 voices generated --- double the volume compared to using a single continuous fin. 10*-15*-20* Yaw Angle Test----Search= IMPACT REDUCTION OF A CAR WITH A VORTEX GENERATOR WITH DIFFERENT SLIDE ANGLES Smoothness - just paint it in the color of the roof, could lay the mounting tabs flat in the box on the activator cover and not in of the packaging with VG = fewer bent tabs. Well done!