I'm pretty sure you can get the same parts and same result for cheaper...
I bought a SS Y pipe for $80, and a set of test pipes for $80. Both items shipped to me.
Also, look in the for sale section, I know there are test pipes for sale cheap right now.
These will give you a little more power, not as much as a full legitimate exhaust, but when I put them on, there is a noticeable difference. It will also change the ton of the stock exhaust which some prefer.
I bought this: (at the time was $80 shipped)
http://cgi.ebay.com/ebaymotors/Nissa...Q5fCarQ5fParts
And these: ($80 shipped)
http://cgi.ebay.com/ebaymotors/370Z-...Q5fCarQ5fParts