The 2013 SRT Viper is a sleek and sexy example of everything that’s great about American muscle. At the heart of this road-devouring snake is a totally refined all-aluminum, mid-engine, 8.4 liter V-10 delivering a class-topping 640 horsepower and 600 lb-ft of torque. This all-American supercar is back and better than ever, bringing sleek lines, heart-pounding acceleration and tire-smoking driftability to the open roads of Forza Horizon. The 2013 Viper will catch nearly anything in its path and leave it in a trail of dust and tumbling leaves. In other words, no matter where you find yourself, the Viper will handle itself with road-hugging aplomb.