Its not a bad kit, but the $1725 price is just a tease. The installation REQUIRES a tubular K, coil overs, etc - and the cheapest one of those I would recommend is the QA1 (I have fought one of the Granatelli kit installs, and they are not as complete as the QA1). I actually prefer MM (Maximum Motorsport) for these parts, but they cost more.
You'll need the MAF and fuel injectors, the fuel pump, and the upgraded turbos (Master Power at least).
Anyway, I ran through their list of "options", all of which you will need if you don't already own them, and came up with nearly $4600 including shipping and tax.
This is a fair price for what is supplied.
I prefer Helion kits, generally, so you might check them out.
"You can never be free until you let yourself go."