911GT3

Did you notice a difference?

Where--less under steer at speed; better top speed; better stability at speed?

Where did you buy it?

Thank you.

ChrisF

No. GMG.

Eddie - RPW

I do use in my own car, specially because I use the wheel flaps attached to it.

I have a few in stock.

TRAKCAR

FWIW, I added a Gurney flap and CUP lip within 30 minutes session after session, same everything and completely forgot it was on the car (My buddy put them on) and I got better lap times. About 0.5 seconds. I think more is better when it comes to downforce.

monochrom3

I have it and notice that I scrape on a lot more things than before

CRex

I run cup lip on the track and restore the OEM for street use.

Practical difference? Not noticeable for 99% of the drivers. (Pete above spends more time at the track than I do at the office so he ain't that 99%). I do mine out of (i) peace of mind that I'm getting max downforce front and back and (ii) cup lip being softer and sacrificial on the rough drive between home and track.