The Porsche 918 Spyder remains on track for debut late next year, with development so far progressing steadily and currently in the prototype stage.

Production of the car is scheduled to start on September 18, 2013, and only 918 examples in total will be built.

Pricing is set to start at $845,000, and if you were one of the lucky few who put their name down for the car you may be interested to know that a special track-focused version is also being developed.

According to Autocar, for a slight premium Porsche will build you a lighter and more hardcore version of the 918 Spyder.

The automaker has reportedly developed a Race Track package for the 918 Spyder that, among other upgrades, includes a stripped-out interior and unpainted body shell. Cars equipped with the special package are said to be around 66 pounds lighter than the regular model, which Porsche has stated will weigh less than 3,750 pounds all up.

Around 20 percent of the orders for the 918 Spyder are said to include the Race Track package, though it’s unlikely 20 percent of owners will ever take their cars to a track. Nevertheless, the option is certainly welcome and should ensure even better performance for the plug-in hybrid supercar.

All versions of the 918 Spyder will feature a 4.6-liter V-8 matched to a pair of electric motor. The combined output of the system should hover around 770 horsepower, which Porsche predicts will be enough for 0-60 mph acceleration in less than 3.0 seconds and a top speed in excess of 202 mph. The best part is that fuel economy could be as high as 78 mpg.