final drive ratio that has been shortened to 3.55 from 3.07. The 2013 Viper models will be more engaging to drive, with top speed now achieved through sixth gear with maximum engine speed (redline) at 6,200 r.p.m.

Starting with a stiffer structure that provides 50 percent more torsional rigidity, the chassis of the 2013 SRT Viper benefits from numerous enhancements--many learned through racing efforts with Viper GTS-R and Competition Coupe models.

Major updates include the addition of a new aluminum "X" brace under the hood that ties the suspension pickup points to the magnesium cowl super casting and contributes to improved torsional rigidity and stiffness.

A new aluminum impact beam at the front of the car contributes to overall mass savings and improved weight distribution while providing excellent crashworthiness, according to the company.

Structurally, many areas of the chassis were reworked to take advantage of new materials, reducing thickness in some areas and reshaping components for more structural rigidity in others. The result is an overall weight savings of approximately 100 pounds.