After over 20 years of owning DeLoreans, I'ved replaced the exhaust gaskets at least twice. I've found the easiest way to assure that the nuts or studs come out easily and without breaking is to first start with a few days of treatment with a good penetrant. If you run the car and burn off the penetrant, that's OK - the heat actually increased the penetration. Just be sure to reapply penetrant when the manifold cools. After the penetrant (such as "Knocker-Loose") has had a chance to work, I use a toothbrush sized wire brush to clean the projecting threads of the stud bolts. This keeps the rust from binding as the nuts are being removed. Finally, when I am ready to remove the nuts, I tap the nuts with a hammer a few times to break the thread seal and then heat with a propane torch using mape gas rather than propane. Mape gas creates more heat than propane (be sure the tip will take it). Once thoroughly heated, remove the nut. Chances are it will spin off without trouble, or the stud will come out. All the better if the stud comes out; you can then install the Grady stainless stud. As someone else mentioned, reinstall with anti-sieze. I did the first time, making the second time a breeze. You might want to remove all of the studs an replace with stainless. The risk is breaking a stud and having a difficult time drilling and retapping. Worse yet, you might break off an "easy-out." Patience, good penetrant and heat are again your best friends. Woody __________________________________ Do you Yahoo!? Yahoo! Mail - More reliable, more storage, less spam http://mail.yahoo.com To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/