The new SRT Viper is powered by a new 8.4-liter all-aluminum, V-10 overhead-valve engine that delivers a total of 640 HP and 600 lb.-ft. of torque — the most torque of any naturally aspirated engine in the world. The engine features a new, ultra-high flow and lightweight composite intake manifold, high-strength forged pistons, sodium-filled exhaust valves, new catalysts to reduce back pressure, and an aluminum flywheel that reduces reciprocating losses.
The Viper has received an updated Tremec TR6060 six-speed manual transmission that has been improved with a shorter throw shifter, closer gear ratios and a final drive ratio that has been shortened to 3.07 from 3.55.
Info and Video via http://www.topspeed.com
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