Of all the things making this GT3 really and honestly the best civilian Porsche of all time, item number one is the masses of added downforce fore and aft. All 911 experiences up until the new GT2 included a dose of nervousness. That busy rear end with the axle spitting out all the power and torque available coupled to just a modicum of downforce has consistently made for a dancing front end and a firmer grip on the steering wheel than I’d like.
Thanks to the new design of the 47.3-inch wide fixed rear wing and the extended front chin splitter under larger intakes, at 300 km/h (186 mph) rear downforce is now 132 pounds with 88 pounds in front. These amounts are roughly five times greater than the previous 997 GT3 and they are crucial reasons for the ability to cruise easily at the v-max of 193 mph, frequently with just one hand gripping the steering wheel while I talk with my co-pilot Jesus (he of the Mexican press corps). The difference in the car’s confidence and comportment is tremendous.
Source: European Car Web