| I know winfactory looks cool but if its actually proven on a track i have no idea... Same with twinZ... essentially its for aggressive aesthetics look. But do they actually add downforce? I came across these other ones here: [ http://www.zshop.ca/parts/z32-eurou-rear-diffuser-type4/ ] [ http://www.zshop.ca/parts/z32-real-speed-frp-full-rear-diffuser/ ] Those ones seem to look more functional if you can imagine the flow of air but since they wrap around the exhaust they look to me a little harsh on the eyes.
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