Rumors on the 2014 Mustang GT500, 2015 Mustang.

While it had been rumored that the 2014 Ford Mustang GT500 would be adding twin turbochargers, Autoblog has learned that this is not the case. The GT500 will retain the supercharger for now, though it's still expected to get a healthy bump in horsepower for 2014. Currently, the GT500 makes 550 horsepower and that number is expected to rise by 20, to 570 horsepower, when the 2014 model appears in early 2013. It's expected that this will surely exceed the output of the Chevrolet Camaro ZL1.

Meanwhile, the waters remain muddy surrounding the all-new 2015 Mustang. Here's a few things we know (or we think we know):

• The 2013 and 2014 Mustangs will remain pretty similar to what we're seeing with the 2012 Mustang. Ford is going to continue to build the current Pony car, possibly with a few minor updates, while they're preparing the next edition.
• A new Mustang will appear for the 2015 model year. It's expected that this will not be just a refinement of the existing S197 platform but, instead, will be a whole new car, and "an evolution of the 2005, 2010 cars." –Ford’s design chief J. Mays, at the 2010 Paris Auto Show. So, what does that mean? We're not sure. It could include many of the changes we reported last month. Of course, the new 2015 Mustang might be something totally different, too, since so few details have been released. Most everything is pure speculation at this point!

We'll keep following along with the rumors/news about the 2015 Mustang and keep reporting what we find out. If you have a source and hear anything, please let us know! In the meantime, what do you think the 2015 Mustang will look like?

Sources: Autoblog/StangNet