autoevolution 9 Apr 2021, 21:12 UTC · by Palm Beach Dyno is the premier choice for Shelby GT500 tuning. A customer of the go-faster shop from Boynton Beach has recently dipped into the 8s on the strip, which is crazy for a road-going car. The Shelby GT500 in the following video is gifted with Palm Beach Dyno bits and pieces as well, and it’s very potent despite having the stock manifolds. 15 photos PBD founder and owner Ken Bjonnes used three pulleys for three dyno runs to see which is the better choice, starting with a 2.7-inch unit. In this configuration, the modified V8 motor lays down 1,038 horsepower and 721 pound-feet (978 Nm) of torque at the rear wheels of the mighty GT500.