In South Haven, Michigan, several Ford engineers were seen with a few pre-production 2011 Mustangs. What made the sighting so newsworthy were the tires on one of the mules.
Instead of the "regular" P Zeros found on 2010 Track Packers, Pirelli P Zero Corsa R-compounds were observed. To those who are unfamiliar with it, these are tires for supercars.
These tires even come stock on the Lamborghini LP560-4. Tongues are wagging on why a Mustang was fitted with supercar tires. Could it be that Ford is merely playing with different tire compounds?
Another explanation is more creative. It had been observed that the Corsa R-compound car (with 315 hp) was lapping the 1.88-mile track just as quickly as the current BMW M3 (with 414 hp).
Weight is possibly a factor since the Mustang weighs 200 pounds lighter than the M3. It can't be torque because they're just about the same. The type of tires isn't very likely either.
However, if the 2011 Mustang Mule with the fancy tires had a 5.0-liter, 32-valve DOHC Coyote engine kicking out 400+ hp and 400+ torques, that would explain its speed.
It has even been speculated that the white mule depicted in the article -- the one that appears to be missing a tailpipe -- isn't a V8 at all, but is instead an EcoBoosted V6 model.