We've only known what the SRT Viper looks like for a short while now, but power-obsessed tuner Hennessey has already announced. The Hennessey Venom 700R bumps the horsepower up to 725 while the Hennessey Venom 1000 rockets it all the way up to 1120. Also available are a variety of different racing and trim upgrades.

What we don't know is how much all of this will cost over the Viper's $97,395 to $120,395. Needless to say, the Hennessey Venom is going to be pricey.

[via Hennessey]