In addition to the Viper GTS-R duo the September Car Pack includes some pretty desirable classic vehicles as well. The 1968 Alfa Romeo 33 Stradale, 1960 Aston Martin DB4 GT Zagato and 1955 Mercedes-Benz 300 SLR are all on the list, as well some oddities like the 1983 GMC Vandura G-1500 aka the A-Team van.
You can see the full list of cars included in the Forza September Car Pack below as well as a video trailer showing the Viper GTS-R in action in the game.
2013 Viper #91 SRT Motorsport GTS-R
The #91 Viper is sponsored by Forza Motorsport, it is a competitor in the 2012 American Le Mans Series. Aside from meeting racing requirements it is nearly an identical twin to its road-going cousin; a goal that was not easy to reach.
2013 Viper #93 SRT Motorsport GTS-R
Sporting the Pennzoil livery--one of the most iconic brands in motoring--the #93 SRT Motorsports Viper GTS-R is a mid-season entry in the 2012 American Le Mans Series. The Viper's last factory race was way back in 2000.
1968 Alfa Romeo 33 Stradale
One of the most beautiful cars ever built. The two-liter V8 engine is only inches behind your head. With an RPM redline of 9,500--outrageous for 1968--you hear a symphony of sound from rumble to scream.
1960 Aston Martin DB4 GT Zagato
The DB4 GT Zagato is widely considered one of the most desirable Aston Martins ever made and only 20 were ever built. The engines enjoyed a higher compression ratio than the standard DB4 and produces 314 hp.
1958 Austin-Healey Sprite MKI
The Sprite MKI was commonly known as the Bugeye Sprite in the U.S., or Frogeye Sprite in Europe due to the bulging headlights in the bonnet. The Sprite was an inexpensive, fun sports car at a time when the only other sports cars made were quite pricey.
1953 Chevrolet Corvette
Most legends come from humble beginnings, and the story of the Corvette is no different. The 1953 Corvette's dramatic and bold exterior was just what the public wanted and it forever changed the course of American car history.
1965 MG MGB GT
In the mid-1960s, the MGB GT offered European refinement for a price the average car buyer could afford. The car's raspy in-line four cylinder delivers almost 100 hp, more than enough to make driving the MGB GT an exciting prospect.
1955 Mercedes-Benz 300 SLR
Driven by a young Stirling Moss and co-driven by journalist Denis Jenkinson, it won the 1955 Mile Miglia rally in record-breaking time and achieved incredible speed--a full 32 minutes faster than Juan Manual Fangio. Moss's record time to finish the famed Mille Miglia in the 300 SLR has, to this day, not been beaten.
1967 Volkswagen Karmann Ghia
Karmann coachworks was under orders to design a sports car to build over the VW chassis. After several of their proposals were rejected, Karmann reached out to Ghia, who delivered a prototype that perfectly hit the mark.
1983 GMC Vandura G-1500
If the GMC Vandura isn't the most classic van of all time--and it may well be--it certainly has the coolest name. Be it a work van, party-wagon, or a rig worthy of toting B.A. Baracus and the rest of "The A-Team" around, this half-ton hauler has potential.
2011 Citroën DS4
Charismatic, practical, stylish, and attractive are just a few words that describe the new DS4. Ergonomics and minimizing environmental impact have been balanced and prioritized in the design as well, delivering comfort, convenience, and that good feeling that goes with "being green."