The 2013 SRT Viper is all-new, from front-to-back and top-to-bottom, from the lightweight carbon-fiber roof right down to its road-scorching wheels. It features less weight, stiffer chassis, a more powerful engine, beefed-up close-ratio transmission, more powerful brakes and new electronic technology. It's all wrapped in aggressive exterior styling with gorgeous interior design, materials and appointments to make Viper more comfortable and capable, better riding, more agile and faster accelerating to a higher top speed. Advancements in materials and…