Finally received my set of 19" Forgeline VX1R's with Michelin Pilot Sport Cup 2's from Competition Motorsport. Ordered early December and got them early March, though the front wheels came in with the wrong tire size and I had to send them back to be corrected. Turns out these actually ship direct from Forgeline, and CMS did a good job getting these turned around quickly.
Ended up not having them in time for a track day where I planned to try them out, but we'll see how they improve lap times at the next event.

Specs ordered were:

19x9.5 ET50 fronts with 265/35 (CMS told me this was not a recommended fitment for a standard GT3, but they clear just fine)
19x12 ET47 rears with 325/30

Weight of the front wheel/tire combo is 46.5lbs, which is pretty much the same as OEM even though 0.5" wider wheel and 20mm wider tire.
Weight of the rear wheel/tire combo is 54.3lbs, which is 2.3lbs less than OEM even though 20mm wider tire. Nice!

To install the rear, it did require replacing the hex head bolt on the rear lower control arm to allow clearance inside the wheel. Though it is commonly known this is needed, wish there was more info out there on it. Porsche part # 999-073-530-01, and need 2. To remove the OEM bolt use 18mm socket and wrench. Use T55 Torx to install the new bolt, and torque to 83 lb ft.

More pictures to come showing them on the car.

 

what did you have before stock 245/305 cup2 setup? curios how much faster the new setup is. let us know.

 

Sweet. Sitting on a set of 19" Forgelines with slicks, but haven't gotten around to using. After these Cup 2's consider giving the Supercar 3R a shot -- faster, more track-oriented tire. One of the main advantages to running 19's is access to 3R and various OE alternatives.

 

Yes, running OEM Cup 2 until now. New setup has a little heavier steering maybe due to 5mm lower offset in front along with being wider.
A little less harsh over road joints with added sidewall.

Some pics from a car meet this morning: