It's been that long since I removed the exhaust manifolds, I can't remember if there's a gasket between the intermediate pipes and the turbo merge housing/elbow or not? Vagcat doesn't list one, elsawin says "not installed". Really!? I've never seen an exhaust system where a gasket or some form of sealing isn't used that close to the head. Especially pre-turbo! The 3.0 TDi engine has them, find it very odd the 2.5 doesn't?