The 991 variant of the Porsche 911 GT3 RSR has had quite a bit of success in the short time it has been racing. In the inaugural season of the Tudor United SportsCar Championship, the rear-engine sports car has two victories in two races. But the racing success didn't start there.

Last year was the first big racing victory for the GT3 RSR, and it came on the largest endurance racing stage in the world. Of course, I'm referring to the 24 Hours of Le Mans where the 991 GT3 RSR managed to win its class at the famed 24-hour race.

It wasn't a completely easy victory with stiff competition, especially from Aston Martin. Porsches have a good reputation for reliability (historically, this is not the case with English race cars), and this really pays off in endurance racing. After all, if you have fewer issues due to mechanical problems and the drivers can avoid contact, you have a great chance of winning.

Fortunately for Porsche racing fans, this success has carried over to United SportsCar racing. The new series that was formed from the merger of the American Le Mans Series (ALMS) and Grand-Am started this season with the Rolex 24 at Daytona.

The American 24-hour endurance race saw some good action. Most classes were tight right up until the end. Many will remember this year's race for the close finishes all-around and the penalty in the GTD class that took the victory from the Flying Lizard Audi R8 and gave it to the Level 5 Motorsports Ferrari 458 Italia.

This was thanks to reversing a penalty that was assessed, but replay showed it shouldn't have been. Even without this added drama, the overall race was one of the best in years.

In the GTLM class, the #911 Porsche 911 GT3 RSR managed a class victory over the #55 BMW Z4. Unfortunately, the #912 car had mechanical issues that took it out of the race for a while and forced a ninth-place finish.

This first victory of the season raised hopes that the Porsche teams would be able to keep up the winning at the 12 Hours of Sebring. Fortunately, they didn't disappoint as once again a Porsche 911 took the GTLM class victory.

Sebring may only have been 12 hours long, but it was still just as challenging a race. This time fortune shined on the #912 car, and it took the class victory over the number 93 SRT Viper. Unfortunately, the #911 car didn't fare as well, and this time it finished in ninth place.

All of this early success has made for some high expectations for the Porsche factory-backed teams. After the two victories, they have to keep any eye out for the competition if they want to continue winning. In both races BMW has been stiff competition, while SRT, Ferrari and Corvette are all close.

Beyond United SportsCar, the 991 RSR will be competing in the World Endurance Championship (WEC), including trying to defend its class win at the 24 Hours of Le Mans.

While the big story of 2014 is Porsche's return to the top level of competition at Le Mans, the Porsche 911 GT3 RSR is another great story for the German performance car maker. If the 991 can keep up its winning ways and the Porsche 919 Hybrid LMP1 race car is able to win at Le Mans, 2014 will be one of the best racing seasons that Porsche has had in years.