The Ford Mustang's most recent generation of models has undergone many changes throughout the years, but probably none like the changes among the 2013 models seen at the Los Angeles Auto Show Wednesday.

Three models-the standard Mustang GT, the Mustang Boss 302, and the Shelby GT 500 -- all had their own range of noticeable changes, signs that Ford is ready to overtake Chevrolet and Chrysler in the highly-competitive muscle-car department. The models are the newest group of the fifth generation of Mustangs that started being produced in 2005.

The most prominent changes to the standard Mustang GT are a bigger grille, a new hood and sleeker, high-intensity discharge LED signature lighting-two horizontal LED light bars now run outward from the headlights, while there's a new piano-black panel between the smoked tail lights, which now feature vertical LED lights.

In terms of performance, the Mustang GT retains a 5.0-litre engine, but now has a V8 with a power boost to 420hp. It also features Ford's SelectShift Automatic transmission that allows drivers to shift their own gears with automatic transmission.

To boot, there's also a new 4.2-inch LCD screen that tracks such performance information as braking, acceleration, lap time and g-force.

According to Jalopnik.com, the Mustang Boss 302 hasn't really been mechanically updated at all, save for a new, more powerful engine capable of delivering 444hp. However, this particular model now comes in a School Bus Yellow color.

The crème of the crop, though, is the Shelby GT 500. The new model will sport a 5.8-liter supercharged V8 engine, rated at 650hp and 600 lb-ft of torque, which are 100hp and 90 lb-ft of torque more than its 2012 counterpart. This will allow the car to reach a top speed of 200 mph. The 2013 Shelby GT 500 also has an upgraded cooling system. Like the current GT500, 19-inch wheels are standard up front and 20-inches are in the back.

Looks like the Corvette, the Camaro and the Charger need to watch out.

Check out the display video of the Shelby GT 500 below:

Chrysler Los Angeles Ford Motor Company Los Angeles