The option is called the Mustang Performance Electronic Parking Brake offered in conjunction with the Performance Pack. It can be added to either engine, the 2.3-liter EcoBoost four-cylinder or the 5.0-liter Coyote V8, and either transmission, the ten-speed automatic or six-speed manual. Checking the configurator, the Electric Hand-Operated Parking Brake comes with the $3,475 High Performance Package offered for the EcoBoost engine, or the $4,995 GT Performance Package offered on the V8. The brake comes standard on the Dark Horse trim.