This is a genuine Vito's Performance product
These are cast aluminum power pistons
They are 68mm, that means bored out one time over
Designed for BIG BORE cylinders - 404cc big bore kits or ATHENA jugs with 110 rods stock 54mm stroke or 58mm 110 rod stroker cranks with spacer plate or cut domes
These have 13 degree dome angle (stock Banshee style)