The slip recorded this carâ s 11.4-second quarter-mile run at a top speed of 116 mph. It was clear that this was no ordinary Mustang Boss 429. Unlike the production versions, this one was ...

The Boss 429 and 429 Super Cobra Jet V8 engines rank as some of the most powerful engines ever put in the Ford Mustang. In fact, if we limit our discussion to first-gen Mustangs, these engines ...