which pistons do u think will have the best overall compression in a B18B1 block??? the p72 GSR piston or the pr3 B16 pistons?? serious comments only please

 

It depends on what you want to do with the motor. The Pr3 will raise the compression, while (i think) the b18c will push it up a tad. Not to sure on the b18c pistons. The Pr3 pistons will work with the ls rods, while the b18c will need some maching to be pressed on.