Today's car of the day is a car you can't get anywhere else because it's exclusive to Need for Speed SHIFT. The Coke Zero® Dodge Viper SRT10 is a completely new version of Dodge's iconic supercar.

This new Viper is only available as an unlockable car in SHIFT and can be used in quick race and online modes. But after driving it once, you'll want to use it all the time.

We took the Viper's stock 8.4-liter (510 cubic inch) V10 and tweaked it significantly, moving to 680 horsepower from the stock SRT10's 600, more than 10 percent improvement. You'll notice the difference as soon as you punch the throttle.

Torque has also been increased, to an unheard-of 949 lb/ft of American grunt. You'll be leaving many GT500s in the dust when you're piloting this modern hot rod.

In case you're not convinced yet, here's a side-by-side comparison of the stock Viper SRT10 - also available in SHIFT - and Coke Zero Viper SRT10.

To unlock the Coke Zero Dodge Viper, visit MyCokeRewards.com. With this promotion, you can get $10 off the purchase of SHIFT as well. 

Click here to get $10 off SHIFT or click here to unlock the Coke Zero Dodge Viper SRT10. Please note that this promotion is open to US residents only.

Check out this blog post from NFSDrew for more info about Need for Speed and Coke Zero.