Wtf sonic hair also come out. I googled "sonic hair" instead of vortex generator (well, just curious what would come out) and all sorts of colour Sega Sonic and punks with bombastic hairs. So means if ur car is as fast as sonic, then you'll probably need it
Install on car without a rear wing...just a waste of $ la...it only creates a continuos flow to your rear wing thus having more differential pressure to create downforce. A laminar flow will have "wakes" at the end of the surface plane thus the flow is messier. Unless you always do 200kmh, who damn cares? Install Garfield sticker is even better...at least it might attract some girls.
And the hair on evo, I don't think they test run it in a wind tunnel coz I'm not aware that Mitsubishi having any. Just high tech flow simulation in a Core i7, maybe