Mike, The company I'm using has been building performance exhaust for years and even built for the De Lorean back in 81 and 82. They still had the Jigs and all the tooling. That was great since I don't have to pay for it. They will be using a one piece exhaust manifold flange and not the 3 piece like the guy did over there. And yes, all 4 holes per port will be used. Even he said HP exhaust will tend to leak quicker. John -----Original Message----- From: Mike Bosworth Subject: [DML] Re: DeLorean headers. J Hervey Can i ask , are you proposing to utilize all four mounting stud points for each exhaust port? 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/