Deliveries of the new road-going 911 GT3 won’t start until the fall.

Last week, Porsche lifted the wraps off the new 911 GT3, the most track-focused 992-generation 911 road car yet. Deliveries of the new road-going 911 GT3 aren’t scheduled to start until this fall, but an even more hardcore version has already arrived in America.

Previewed last year, the first 23 examples of the new track-only Porsche 911 GT3 Cup have now been delivered in North America at a facility near the Hartsfield-Jackson Atlanta International Airport in Georgia. These are the first customer race cars based on the new 992-generation 911 that will compete in one-make racing series.

Among the first teams to take delivery of the track-only 911 GT3 include 311RS Motorsports, TPC Racing, Wright Motorsports, and JDX Racing. Teams now have two weeks to prepare the 911 GT3 Cup for a test session at the Sebring International Raceway on March 8 – 9 before its competition debut at the Mobil 1 Twelve Hours of Sebring on March 17 – 19.

This year’s Porsche Carrera Cup North America one-make cup championship will host 16 rounds spread across eight locations. Drivers will compete in three classes: Pro, Pro-Am and Pro-Am 991. All drivers can compete in the Pro class but must use the latest 911 GT3 Cup race car, while non-professional racing drivers are allowed to compete in the Pro-Am class.

Since production of the new 911 GT3 Cup racer is limited, the last-generation 991.2 cup car will compete in the Pro-Am class. As well as the Porsche Carrera Cup North America, the new 911 GT3 Cup will race at the Porsche Mobil 1 Supercup and national Porsche Carrera Cups in Germany, France, Asia, and Benelux. Powering the new 911 GT3 Cup is the same naturally-aspirated 4.0-liter flat-six as the old car, uprated from 485 hp to 510 hp. Thanks to extensive use of steel aluminum, pounds, and carbon fiber, the new 911 GT3 tips the scales at just 2,777 pounds.