Powered by a front-mounted 8.3L V10 engine, the 2013 SRT Viper now generates 640 horsepower and 600 pound-feet of torque; a six-speed manual remains the sole transmission option.” Production will begin later this year, but no word yet on pricing. Click here for more pictures. Continue reading for a video.

Reduced weight was a primary goal of this Viper program, so its doors and sills are formed from aluminum, while many of the body panels are made from carbon fiber. Claimed curb weight is 3,297 pounds with the optional Track Pack. SRT officials claim this Viper’s horsepower-to-weight ratio is topped by only the Ferrari F12 and Bugatti Veyron.

[via InsideLine]