For as long as Porsche has been producing its acclaimed 911 series, aftermarket tuners have tried to spruce up the sports car's appearance and at times improve its aerodynamic properties as well, with specially crafted parts. [...]
Source:
Carscoop
https://www.tuning-links.com/news_4068_Techart+Launches+a+Collection+of+Rear+Spoilers+for+New+Porsche+911.html