I have a 99 Ls 2dr and I just got a JDM ITR header. I have a sound choice hi flow cat also. I'm not sure if I"m using the right word for the part , but where can you get the lead doughnut gasget to fit on the end of the header. By this I'm not talking about a flat gasget. I live in Huntington WV, and finding a part like that is nearly impossible, so it would most likely have to be on the internet....