When we started, Steeda's '10 GT laid down 274 rwhp and 299 lb-ft of torque. For a real-world test, we ran the car at full operating temperature and dyno'd it with the hood closed. After our installation, output picked up to 287 rwhp and 304 lb-ft of torque for a peak gain of 13 rwhp and 5 lb-ft of torque. Although the peak gains are solid, the gains across the entire graph were substantial. The torque curve smoothed out across the whole graph, with gains as big as 20 lb-ft in some spots. Horsepower was increased tremendously between 4,500 rpm and redline, with a gain of almost 25 rwhp at one point.