We're still talking well over 600 ponies here.
Looking to buy the best Mustang on the market right now? That would be the limited edition Shelby GT350, and the even rarer GT350R. You can't go wrong with either one, as both are powered by a 5.2-liter flat-plane crank V8 with over 500 horsepower and 400 lb-ft of torque. Heck, even the standard Mustang GT is more than acceptable with its 5.0-liter V8. But there could one day soon be yet another Mustang on the market, the return of the GT500. Ford hasn't officially ruled it out, but nor has it confirmed anything just yet. What could be the engine choice for that?
Think about it: what other recently revealed Ford is capable of producing above 600 hp? The new GT, and what powers it? A 3.5-liter twin-turbo EcoBoost V6. So picture this possibility: that engine along with heavy doses of carbon fiber for the body panels and various other components, along with numerous suspension tweaks based on what Ford Performance will gain from racing the GT at Le Mans. Could all of that be applied to a new Shelby GT500? It's all a very real possibility. But a twin-turbo V6 Shelby? Hey, why not, as Carroll Shelby himself once said: "I love horsepower."