there are two different part numbers, i cannot remember right now, but i think the it ends in AE, the on that ends in AC AVOID.. if the motor was made at tail end of 2008 or after yopu should be good, stanton eingeneering was making them and they used the world block!!! thats the one you want!!! the current ones do not use world block, so if its a few years old odds are it has it,,,