Standard bore(99.5mm)drop-in CP pistons for sale ! I bought them for my Sti cause I blew either a ring or the piston on #2 cyl. I didn't realize that I will have to bore out the cylinder cause of damage caused by the ring or piston. They are used(not by me)with 5k on them and were pulled cause the owner went with a bigger set . My loss your gain, I'm asking $330 o.b.o They come with rings, pins, and pin bosses. PM me for pics !