2010 Dodge Viper ACR-X

Priced at $110,000, the ACR-X retains its 8.4-liter V10, but gains a set of racing headers and a low-restriction exhaust to increase output to 640 horsepower -- an additional 40 ponies over the standard model.

The suspension has been tuned for track duty, the weight has been cut by 160 pounds and a new set of aerodynamic enhancements improve downforce, while a roll cage, fuel cell and race seat get it ready to compete in the SCCA and NASA Viper Racing League. Production begins this spring, with the Dodge Viper Spec series kicking off in July of 2010.