For those of you who were disappointed a ZR1-equivalent wasn't among the initial offerings for the 2014 Chevrolet Corvette, Hennessey has answered your prayers with Stingray upgrades that boost output at the crank to as much as 600 HP.
Hennessey was able to extract about 50 horsepower from exhaust tuning alone as their $4,995 HPE500 upgrade consists of new piping from the headers back, retaining the factory rear-section. For $10,950 the HPE600 kit adds some internal modifications and computer tuning dialing power to, you guessed it, 600 HP.
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