Make a long story short, I bought these items wanting to build my motor yet still keep it at 81mm bore, Now i've changed plans and are going to be running 85mm bore, both items are brand new. P73-00 (JDM ITR) standard size pistons, a Mugen 2-layer headgasket, and a Dc Sports 4-2-1 header for a 94-99 GSR. I'm selling the mugen HG for 155 shipped and pistons are 250 shipped OBO