[StickMon]

Just to recap:
Stock US headers, RE midpipe, stock X-pipe, RE Diablo cans.
The midpipe definitely takes the loud up a notch.
It used to set off car alarms with just the cans. I would say it's now at the limit for sane street use.
The RE X-pipe would have the neighbors walking around a petition.

So plan (A) was to drop the midpipe and X-pipe as a unit, then swap the midpipe, and pop it back in.
I naively overlooked the several torque-to-yield bolts.
Searched the TIS and couldn't find torque specs.

So who knows the torque specs for:
1) Rear tension struts
2) Rear reinforcement plate

Went to plan (B) and just swapped out the midpipe. As expected, the top rear flange bolts (more so the nuts) are quite a faff. Reassembly's not so bad, because the secondary cats are out of your way.
The fit's not 1/2 bad. They put honkin' holes in the flange to the X-pipe, so you get a little slop to play with.

I seem to have a whistle or buzz under heavy acceleration, though.
I'm tired of being under it, and sore, so I think I'll drive it for a week to let it settle in and then check the flanges and clearances.
I think the twist of everything under high torque is bringing one of the pipes up to where it just starts to touch the trans brace.