WHAT DOES ROTARY 13B MEAN?

 Endurance races such as the Rolex 24 & twelve hours of Sebring, to our modern victories in time assault sprints, along with around 2000 Pettit built engines delivered to purchasers across the globe has built our standing for offering top rated overall performance and unmatched longevity. What exactly will make Pettit engines the most effective?..