These are forged cp 9 to 1 compression, 6 bolt pistons that were used in my friends tsi for 2 months when he decided to get an evo so here they are brand new cost $600 shipped, i will sell them for $350 these are in great condition and got my friend to 11's in the 1/4 with other mods, if you want pictures send me your email adress i have a few that i can send, any more questions pm me and i'll answer them, thanks for looking.