DaimlerChrysler Street Racing Technology (SRT for short) made big changes to the Dodge Viper in 2003. The new Dodge Viper SRT-10 has become more angular. The engine was increased in working volume (up to 8.3 liters) with an increase in power up to 500 hp. and maximum torque up to 712 Nm, the weight of the engine has been reduced to 230 kg. The chassis has also been improved, being more torsional stiffer and 36kg lighter. An even stiffer and lighter chassis is used in the Hennessey Viper Venom 1000 Twin Turbo version.