not exactly sure i think it is 1 to 2 teeth off i tried to use the d15 belt and it will fit on it but you will never get it i tdc it will always be off for some reason after i tried 3 or 4 times i went out got the y8 belt put it on and it was prefect the first time. so after that i would suggest going out and spend the forty $$$ and not waste the time on the d15 belt it won't work