All the Porsche wings that guys are talking about here will reduce lift, except the 3.8 RSR wing -- which actually
provides downforce.
I have both the ducktail and a 3.8 RSR wing. In April, I drove at Willow Springs and was running 1:33's on street tires. Last weekend, I went back with the ducktail and the front splitter taken off. I couldn't do better than 1:37's on the same tires.
Granted Willow Springs is a faster-than-normal track. And granted, the 3.8 RSR tail (with extensions) is ugly. But you can't argue with results.
Looks better:
Goes faster:
