Most-Watched Video Reviews of the Week

After a two-year hiatus, the SRT Viper is back for 2013. The model still features its powerful 640-hp V-10 powertrain, but the sleeker body has magnesium as well as carbon fiber in it, helping to lighten its weight by 105 pounds compared to its predecessor. Check out the video above to hear how the most powerfully aspirated engine for a production car sounds at idle.    1.  Video: Cars.com's Chevy Volt at 18,000 Miles 2.  2013 Ram 2500 at the 2012 Work Truck Show 3.  This Is What the SRT Viper Sounds Like and It's Awesome 4.  2012 Jaguar XF Video 5.  2012 Infiniti FX35 Video from KickingTires http://blogs.cars.com/kickingtires/

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