This is the Novak Ballistic Spec Brushless Sensor Based 25.5 Turn VTA Motor. Upgrade optional motor for the Vintage Trans-Am (VTA) class Meets Trans-Am Association's guidelines Blue anodized sleeve differentiates motor as vintage Trans-Am specific Completely rebuildable allowing upgrades or replacement of various parts Easy to adjust timing assembly 12.3mm nickel-plated sintered neodymium rotor for maximum performance in high-temperature conditions 0.125" (3.2mm) pinion shaft accepts all existing pinion gears Color-coded hand wound stator identifies number of motor winds Sensor-based for excellent torque and low-speed driveability Compatible with the Novak GTB, Slyder and Havoc 3S electronic