Louvres test-fitted.
Mufflers test fitted...
This is an enormous PIA, by the way. The mufflers would not slot in until I removed that stiffening plate I just made in the back. The shrouds kind of curve around the mufflers and so you have to leave the pan loose and jiggle the exhaust in.
Just a few more little pieces to make and then some final thread-certs and rivets, clean up, tapping, etc.