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Use these slip on shades.  I've got them on my car as well as tint.  Can't find an application list although I've seen Volvo V70s with them on.
http://www.shevron.com.au/window_SOX.html...

The picture didn't show for me so I'm only assumeing here.  At the most the bar would be a tube that runs from under the bumper, up and across the grill and down again.  I assume it has...

You can get a combined cellphone/GPS antenna that mounts on the inside of the windscreen.  I have heard good reports about here in Australia.  Try www.rfindustries.com.au .

Have you tried Hitec mufflers?  Or your local exhaust shop for a custom system?  I think IPD does one for the current car but the cost of getting it shipped from the USA may be very high.

When I bought my Mazda new a few years ago, I was told the best thing to do was give the car a good run in the country and generally drive it normally, when warmed up to operating temp.  Then...