I know I should have inventoried everything, but had the heat shrinked bag that looked like it was all there. I am missing the two copper gaskets that mate the y pipe into the manifold and the stainless o2 sensor studs. I have tried to call EMS all morning and no answer or returned call. Anyone have any suggestions or specs on the 02 sensor studs and gaskets.

and it backed off. the other because I did not retighten everything after a week or two of heat cycles. I got the OEM's from the parts counter. Installed, and checked after about 500 miles. I was able to tighten all four about a quarter turn. I have not had a leak since.