Yes, we got more Viper material for you! Here’s the official trailer of the car from Forza Motorsport 4. It will be features in an upcoming pack offering the players a virtual chance of driving and experiencing the fury of its 8.4 liter V10 engine and 640 horsepower that it makes. There’s a lot of sideways action going on in this teaser. Not sure if the actual car is as tail happy as it’s shown here, but it looks like a lot of fun.