Im a looser, and dont listen to me, but.....
I did use the ones from Mikes and so far so good. Didnt want to wait for my yama dealer and mikes is overnite shipping for me,....1 day.... I hate paying the shipping, but it is very fast. The seals worked fine for me. I may order a set from the dealer to keep in my parts drawer. But no complaints from me for the mikes seals. OEM has to be better, but so far so good with mikes. Best of luck.