The S650 Ford Mustang is proving itself ... more drama whenever possible, and AWE Tuning is obliging with new exhaust options for both the regular GT and the track-focused Dark Horse.

As per AWE's Mustang chassis dynamometer, the FL5 develops 326 horsepower and 300 pound-feet (407 Nm) completely stock. With the Touring Edition cat-back exhaust, the numbers improve to 340 ...