ok... well I am still alive.. but I thought you all deserve an update! Although the wife hasn't driven it yet, so maybe I'm on borrowed time.
the exhaust is on, it wasn't a 100% pain free fitting, the middle hanger needed adjustment to line up with the mount on the car, probably because the exhaust is supposed to be for a 400. or that my car is a launch edition?
I think the heat shielding somewhere needed a tweak, maybe around the ARB?
for now I have decided to temporarily hook the valve up for always quiet mode.
currently I have the vacuum line tee'd into the line that goes from the manifold to airbox, this means if I open the throttle above about 1/2 (for more than a second) the exhaust goes into loud mode.
I'll be moving the line to tee into the one from airbox to vacuum solenoid, to give always quiet mode for a week or so.
I might try always loud mode for a week, but i think it'll be too loud for my taste.
I have also ordered parts to hook up a vacuum solenoid in the factory position (as per MY12+) and a remote kit so i can set one of 3 modes. 1.Loud, 2.Quiet 3.sport button - so switchable on dash, and opens at high RPM with the airbox flap.
currently it sounds very nice, throaty and no drone not too loud. with my foot down, so I think valve open, it's quite loud, i can hear the noise bouncing off walls!
another interesting thing, the exhaust tip seems to stick out the rear clam a little further, maybe 1/2 or 1" or maybe it's supposed to be like that so when left running on the drive it doesn't cook the clam?, I prefer the look of the twin tips, so maybe something I might change later on anyway.