Tag Archives: Hennessey Motorsports

638-hp not enough: Hennessey takes 2009 Corvette ZR1 up to 755-hp

As if the 638-hp 2009 Chevrolet Corvette ZR1 wasn’t powerful enough already, Hennessey Motorsports has decided to offer two performance package upgrades for the Chevy beast that takes it up to a total of 755-hp. The first package, known as the ZR700, adds a supercharger pulley and blower snout upgrade, an intercooler system upgrade, a […]

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