Forza Motorsport 4 Car Packs are a great way of keeping the game updated with the latest cars as they are introduced. It is also a good way for the game makers to make a few extra bucks. They just announced the Pennzoil Car Pack for September, and it includes  both of the SRT Viper race cars from the American Le Mans Series. This is your first chance of experiencing the power of the Viper’s new V10, virtually!

The pack costs 560 MS points, which is about 7 bucks. Given the list of the cars it adds to your garage, it’s worth it:

2013 Viper #91 SRT Motorsport GTS-R
2013 Viper #93 SRT Motorsport GTS-R
1968 Alfa Romeo 33 Stradale
1960 Aston Martin DB4 GT Zagato
1958 Austin-Healey Sprite MKI
1953 Chevrolet Corvette
1965 MG MGB GT
1955 Mercedes-Benz 300 SLR
1967 Volkswagen Karmann Ghia
1983 GMC Vandura G-1500
2011 Citroën DS4