This is what I found:
http://www.shoshop.com/Guidelogs/svtguidelgv10/svtchp1.htm (not a very good price) Listed: $399
http://www.spmotorsports.com/contour_exhaust_ypipes.html (Better Deal) Listed: $349
Maybe see if Chris from ctamotorsports can get anything. But i think you will be able to get it the cheapest from shoshop seeing as how they are the producer.
Let me know if you need any help, I have a bit of free time.
Later
