I think a bit of materal transferred from my hondata gasket. Oh well its still plenty good to reuse. Catch can fittings in. Need to get a freeze plug for the breather box hole and wither cap off the top fitting, swap it with a plug or something. The plug from my endyn kit is on my other block, I used a rubber expandable freeze plug grommet thingy on my EG for the breather box which i thought was a good solution but..it wasnt there anymore when I took the catchcan fittings off that block..so..