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 […]
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Ready for Takeoff: 727-HP Roush P-51 Mustang
