Exactly Quick GMC, with Ford's turbo motors, and GM's and Chrysler's 3.6l V-6 engines, those cars can get up and run. I know a guy who had a 3.6l Camaro that had some engine work done and he was running well into the 13's, and it was all naturaly asperated. My Chrysler 200 Touring is factory rated for 283hp and they're usually solid 14 second cars is stock form with the cheap, tractionless factory tires, then if you look at the Camry and Accord models with the V-6, they're right there with the V-6 200's and Avenger in quarter mile times. Some wouldn't call them muscle cars, but they are mid sized cars with some pretty healthy motors in them for their size and weight and capable of trailering what some would consider a muscle car at the strip.