It does make a big difference at high speed. That is why I have been reluctant to change to other aftermarket spoiler. Not sure how others would function. While it doesn't create downforce it does prevent lift.
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2000 Black Boxster S
EVO Intake & GIAC Tuning
Headers & Porsche Sport Exhaust System
ROW M030 Suspension
Front & Rear Strut Braces
B&M Short Shift & EVO Billet Linkage
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