I am needing to know if the 6.9 and 7.3s will interchange exhaust manifolds. Im under the impression that all major hardparts have the same bolt patterns but wanted to make sure
Were talking about just 7.3, not a powerstoke. And I dont think you really need headers for a naturally aspirated diesel. I guess it depends, but I have never seen them
Any 6.9 or 7.3 IDI exhaust manifolds will interchange. But only if they are for a truck application, I think you run into some issues if you try to use exhaust manifolds from bigger trucks, like IH trucks and what not. Careful with the wording guys, you can use 7.3 turbo IDI exhaust manifolds as well.....just cant use 7.3 Powerstroke exhaust manifolds.
Yes there are headers for diesels. Stans-headers sells them for the 6.9 and 7.3 IDI's, I think they are around $300. Will they help, you bet. If you dont ever plan on turbo'ing it, then I would say go for them. They will reduce EGT's so you can turn your pump up a little bit more to get more power out of them. You can also get headers for PSD's I believe, or you could go all fancy and custom make your own headers, but I dont see much help if you were doing it on a turbo'ed truck.
If anyone is interested, I have a set of 1990 exhaust manifolds for sale.
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