Dodge announced the next chapter for its Viper supercar this week, revealing that they’re working on a new model that will be the fastest street-legal version yet.

The 2016 Dodge Viper American Club Racer (ACR) is powered by a hand-built 8.4-liter V-10 engine. rated at 645 horsepower and 600 lb.-ft. of torque — the most torque of any naturally aspirated sports-car engine in the world.

While it has more horsepower and torque than the previous model, its improved performance comes from the attention to aerodynamics and the 2,000 pounds of downforce created by its huge rear wing and front splitter.

The ACR is a performance trim, denoting that it’s track ready. The first Viper ACR was introduced in 1999, with the last version being discontinued after the 2010 model year.

The current Viper returned to the market in 2012.

Pricing is currently unknown, but the 2016 Viper should be available later this year.