2013 SRT Viper with Hennessey Performance Upgrades on the Dyno

Hennessey adds long-tube headers, a 3-inch exhaust, K&N filter and high-flow cylinder heads to bump power up to 725 hp and 695 lb-ft of torque–that’s a major improvement over the stock 640 hp! Video after the jump! Via GTSpirit

2013-Hennessey-Viper

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