MRR V3 stock competition motors are based on the successful V2 platform with various updates to take overall performance to the next level. Improvements in this generation are significant, and will make a noticeable performance gain. That includes: Engineered & Developed right here in the U.S.A. 1-piece precision machined motor can design that eliminates the need for long motor can screws. Stator shape that meets the latest ROAR regulations for the highest legal performance. Realigned sensor positions for more accurate reading. Premium Ultra High Torque Rotor is now standard by default. You get best performance right out of the box.