Ok, I did search and did not find my answer. So, here goes. I have an LS block that was run as an LS/VTEC with the stock pistons. Now, before I purchase new pistons what would qualify for me to bore or just hone (cross hatches) out the cylinders, I was wondering if I have to go up in size or if the 81mm (nippon or ycp) pistons would fit in the cylinders. I have yet to measure the bore of the cylinder, but how close are these pistons (really) to the proclaimed diameter of 81mm??? Bigger or just a tad small. There is a small lip at the top of the cylinder liner that you can hang your nail on but, no major gouges. Thanks in advance on the advice.