502 diff balls

[m1buc]

HI guys,

I will be building my 502 soon and want to put in ceramic diff balls. I did this in my 511 and made big difference

can any one confirm, I think there are a 3/32 size with 12 balls in each diff ??

does any body know what the best grade is to get
(i.e grade 5, Silicone Nitride ) not sure what this means? or where I can get them from.?

thanks mike