Haven't done head gasket ...had a broken exhaust manifold header that I replaced. My cats look bad. the heat shields are just kinda hanging on for dear life lol....it looks like the previous owner maybe tried an adhesive to hold them (heatshields) on...from rattling maybe ??? Or they're spooging some whitish, rusty lookin crap outta them lol... I don't know man... its dark. I'll check again tomorrow, Im beat...long day. Thanks for taking the time everyone. I'll update soon.