The 2013 Shelby GT500 is already the most powerful GT500 ever launched, thanks to its 662-horsepower powerplant. However, the guys over Lethal Performance also worked on making it the fastest GT500 out there.

This isn’t the first time we’ve seen Lethal Performance take to task on the GT500, as it did so in mid-2012. This is obviously an update, as the comparison between the launch of last year’s model and this model shows a dramatic difference.

The tuner updated the engine with new camshafts and connecting rods, a modified ECU, a new valvetrain, and new oil coolers. The tuner also installed a new exhaust system and a 4-liter Whipple supercharger kit priced at $5,047. The GT500 has also been equipped with a new set of drag-racing-ready wheels with skinnies up front and a fat pair of slick hanging on the back end.

However, the tuner did not reveal any specifications just yet, but the model already scored an astounding result on the quarter mile. The Shelby GT500 by Lethal Performance ran the straight-line track in just 9.3 seconds at a top speed of 147 mph.

we can’t wait to see the final specifications…

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