What is the sound of 727 horses at full gallop? In Roush’s P-51 Mustang, the answer is up to you. While there are plenty of performance vehicles that have adjustable exhaust notes, not many can do so via a smartphone app. A couple years ago, Roush introduced an Active Exhaust program for iOS that does exactly that, and it’s featured on Roush’s new 727-hp P-51, its most powerful Mustang yet
Those who know aircraft history will already have noticed that Roush’s new model is named after a fighter plane, the North American Aviation P-51 Mustang, as founder Jack Roush is an aviation enthusiast.
This P-51’s power comes courtesy of a 2.3-liter TVS supercharger with a stage 2 upgrade bolted to the Ford’s standard 5.0-liter Coyote V-8 engine. In order to keep all that power in check, the P-51 has heavy-duty TrakPak half shafts and three-way adjustable coilovers. Also on hand are performance rotors and pads for the Brembo brakes and 19-inch TrakPak wheels from Weld wearing Continental ExtremeContact Sport tires.
Though it’s still recognizable as the famed pony car, the P-51 has undergone some pretty substantial exterior alterations. It has a new front fascia with bigger upper and lower openings for better air flow, a chin spoiler, a front lower splitter made of carbon fiber, and heat extractors built into the hood. It also has a wide hood scoop, rocker skirts, scoops on the body side and rear windows, and a carbon-fiber decklid spoiler. Some of these pieces have been used on previous Roush customs,
The P-51 costs $42,500—on top of the cost of the Mustang GT itself. Roush is only building 51 examples, but for buyers who are missing out, there’s a Shelby GT500 on the way.