CBR Forum - Enthusiast forums for Honda CBR Owners

I am tryng to decide what to do on my motor, anybody have experience with the JE 2 over high compression pistons (13-5-1), and any feedback on power gain from the pistons and port and polish head will be great, I am trying to decide if the $800 for the port and polish is woth it, the pistons are $640, I was told 15hp from the pistons and 5-8 hp from the port and polish of the head but want to know if anybody has it. And I know that this numbers are including a good pipe, filters and good tuning. thanks