I'll second avoiding the track when wet, especially if you haven't tossed on better brake pads and tires for wet surface performance. Other than the main straight, the passing zones are fairly short, so it's not really the best on a wet day.
The Ridge may be a better bet if you want to get some...
I have but only in the dry. The main concerns are the lack of runoff space anywhere on the track. Except for turn 2, if you go off, its a wall or trees. Also, it could really do with a re-pave.
Up here near Seattle, I haven't really seen many 370Zs around. The only one I remember was cruising with me and a Ferrari somewhere between Tacoma and Tukwila.
The only cars that tried to challenge me were muscle cars down south, and they tend to be teenagers in the base models or the base V8s...
It makes a fairly large difference in noise. If you pop out the stock pipe, you'll notice it's plastic and has some bumps/ridges on the inside to reduce noise, while the MST pipe doesn't have any of that.
As for the hose, I was lucky not to break mine, but had clamps and zip ties on hand in...
Congrats!
Front Tow Hook: OEM is free. If you want a better looking one, Raceseng is pretty good; it's the one I got -- I got mine with a GoPro mount since I wanted an exterior mount for my cruises and laps. ZL1 also offers some options that are functional but I couldn't ever find one in stock...
To be fair, the sector of I-5 from Tacoma to Everett and from the coast to Issaquah gets a massive surcharge.
The big killer is 10% sales tax on any car.
I went gloss black with my stock wheels, but with the brake dust, they look satin most of the time. I've also got some satin black TS-5s, which will be my summer wheels, while the OEM wheels will have the all-seasons for winter.