how do i tell what pistons i have?

[dragbanshee22]

i have a banshee bored 40 over and i have the pistons out of it doing a re-ring and dont know what brand or how to tell, they say 1.0mm and 513P4, i hered that wiseco pistons used different rings than other brands.is that true? because im not sure what rings to get for it. can you help?

[Titan up]

Thats a Wiesco piston.