They had a donut in them .. but I always had a problem with them leaking ... I cut the muffler flair end off and welded on a 3 bolt header flange and then used that new ALUMINUM TYPE header gasket and havent had a problem ...since that time.
Ron
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.