hey Big_C, welcome to the forum, and congrats on the Z
My Z is also in PW, love the color!! Sometimes I get blinded during a car wash, LOL.
Regarding your Qs, I have installed K&N CAI in my Z too, I purchased it from eBay, the seller shipped vis UPS, so I had to pay some duty, but not much, after all the tax and stuffs, it is still cheaper than buy it in Canada...
Not that I don't want to support our local, but the difference on the price is about $150....
So you know what I mean...
You mention in your post that you can get it for $350+S&H, how much is the S&H? And do you have to pay HST on top of that?? Don't just look at the item price but the ground total, cos that's the final $$$ you have to pay....
Most of the time I ordered stuffs from eBay, as long as it is a trustworthy seller and the price is right, usually it's much cheaper than Canadian retail....
For some seller, you can ask them to ship with USPS, it is very dependable too
anyway, congrats on your ride and GL with you mod, anything you can search in the forum or just ask around in here, ppl in this forum are very very nice...
But, make sure use the "search" button first before you want to start any thread asking something....
Talk to you soon.!