If the part numbers are the same, then they have the same timing. Same part= Same part. Remember I am talking about the stock version. I can't speak for the modified version. Why is it so difficult for people to believe that the stock JP FX might be just like a Nova, Rex, Top......... They are the same engines (as long as you get the same production runs.) The only difference is the case. The difference in the cases is what name is molded into it.