ud raise ur comp about .5 by doin this..worth it NO..ud get .2 by changin to a 2layer head gasket which would be A LOT easier and cheaper...if u want to raise the comp..get some pr3s or p30s pr3 = 11.37 p30s = 11.59 ...this is approx .. other things apply...what layer head gasket..if the head has been shaved any CC work etc...but for the amount of work to swap out pistons..bcuz u dont want to swap pistons out without gettin new rings/bearings plus new headgasket fresh hone etc....think about everything..its not a simple swap out of pistons ... if u want it done correctly...