AMC six O-ringing can be seen here: <http://wps.com/AMC/Navarro-turbo-motor/index.html#HEADS> The rings are STEEL or some alloy like that. There's two, one in the head one in the block. Signs of a bit of sealer around the edges, no gasket. 30 - 45 psi apparently. _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list