I've put this off until now because the engine is still full of preservative oil, but I'm at the point where this domino needs to fall.

I pulled the exhaust port covers and lower plugs to drain the oil out of the exhaust ports and then installed the exhaust.

Let me just say; The Vetterman exhaust is worth every penny- That thing just fits. no problems at all.

The instructions say that you can use anti-seize on the studs and call for a torque of 180-200 in/lbs. This is on the low side of Lycoming's standard value but I went with 180 as a starting point. If I see leaks during flight test I'll up the torque to 200. I also applied a nickel anti-seize.
I want to make sure that I got these flanges flat on the crush gaskets, so I torqued the nuts down sequentially while holding up on the aft end of the pipe so it would draw down symmetrically. 75, 100, 150, 180 in/lbs.

I still have to work on the aft hangars, but it feels good to see a big change like having exhaust hanging there.

FYI- people have questioned how you get access to torque all of these because some of the nuts have tight access. All of them are accessible with a socket and straight extensions with the exception of the aft stud on cylinder 1. With that one I had to use a wobble extension, but no big deal.