There’s no doubt the 2014 Chevrolet Camaro Z/28 is great track machine, but it seems some enthusiasts aren’t quite happy with the 505 horsepower and 481 pound-feet of torque delivered by the naturally aspirated, 7.0-liter V-8 engine. Fortunately, those in need of more power with a Z/28 badge can take it to the handful of tuning shops that offer various upgrades for the muscle car. One of them is Hennessey Performance, who has no less than five packages in store for the Z/28.

The range begins with the HPE600, an upgrade that increases the engine’s output without meddling with its all-motor nature. Using ported cylinder heads, revised valvetrain parts, a new camshaft and Hennessey’s trademark engine management calibration, the HPE600 update takes the Z/28 stock output to a whopping 636 horsepower. That’s 131 ponies over the standard vehicle and a whole lot of power for a mill devoid of forced induction.

As is the case with most of its creations, Hennessey dropped the Z/28 HPE600 on the dyno for proper testing and tuning. The run revealed the muscle car gets 552 ponies and 474 pound-feet of torque to the rear wheels. Is that enough for you? Hit play to hear that beefed-up 7.0-liter LS7 engine roar!

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