I have 2 flywheels. One is off of a 2000 civic ex, which I believe will be the same size. I believe the 2nd one I have is off of the z6 engine (95% sure, its the same size as the 00 one). The only markings on it are L1 and 3-O. If there is a way for me to measure them I will. I will be in the Hartford area today. So I might be able to meet up depending on when I am helping a friend move. Ill pm you contact info.