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The update isn't too bad. The hardest thing was getting the old up-pipes out.
If you need advice or have questions, let me know. I just did mine a few months ago.
I can't say it made a big difference, except for the turbo I put back on. But it does make me feel better when I compared the 2" intake manifold boots to the new 3" boots. I still can't figure out why Ford would have made it only 2" when most everything else is already 3".??
Jim has you lined out on what you need. Only other thing is Gray Ford RTV for the plenums. It is a pretty inexpensive swap except for the bellowed up-pipes, but it is highly recommended to use them so you can just be done.
Well like he said, you're doing the upgrade I want to do and while you're at it why not change out your intercooler, a lot of people seem to like going with the IC's off the 6.0's
You'll have to talk to Clay about the price and what he can get for you but he should be able to get most if not all of what you need and save you money.
Clay likes to keep his sales private but he's great to work with!