2021 Shelby GT500 Mustang Invokes Thrills Wins Over Enthusiasts Supercharged V8 steals the show and wins over the hearts of Mustang enthusiasts. 2021 Shelby GT500 Cobra Mustang is a memorable muscle car that’s sure to hold its value and become a collector car. Advertisement As an automotive journalist some weeks are better than others. And some weeks are downright memorable. This was one of those weeks as I had two very special cars to drive. More on the other car later this week here at Torque News. For now, let’s focus on the very memorable 2021 Shelby GT500. I was set to speak before a couple of Mustang Clubs to promote my book Mustang by Design (available on Amazon). My speaking engagement was at the Halderman Barn Museum, which is a Mecca for many Mustang clubs in the Midwest. This time, I would arrive in style.