Originally Posted by Motorman

it goes like this

Top quality fit and finish parts go into genuine Novarossi's
2nd level into Top
3rd level into Rex

All good parts just different levels of tolerance control. Even though those tolerance levels are extremly small (smaller than 90% of the rc racing world has the equipment to measure even if they knew what they were looking for)there is a difference in performance. Hence the reason the durability and performance of the true Novarossi is superior as is the price. you get what you pay for in many cases.