Deliveries of the car, which is the lightest available version of the 911, begin in late summer. It is priced at $185,950, including a $1,050 destination charge.
Production is limited to 991 cars worldwide.
Aimed at Porsche purists, the 911 R is equipped with a 500-horsepower 4.0-liter flat-6 engine mated to a six-speed manual transmission instead of a dual-clutch transmission. The engine comes from the Porsche 911 GT3 RS.
The 911 R accelerates from zero to 60 mph in 3.7 seconds and has a top track speed of 200 mph.
"The 911 R underscores Porsche's commitment to building emotional and engaging high-performance sports cars with a maximum amount of driving pleasure," Porsche said in a statement.
Weighing in at just 3,021 pounds, the 911 R (the "R" stands for "Racing) is 110 pounds lighter than the Porsche 911 GT3 RS.
Rear seats are deleted to cut weight, while air-conditioning and an audio system are options.
Edmunds says: The 911 R promises to be an instant collector's item. It's time to get the conversation going with your Porsche dealer if you want to get your hands on one.