I bought a set of Berk HFCs from a friend (used) for my recently traded G37, and plan to go with the FI exhaust/stock cat combo on the 370z. Comes with everything, but I imagine the buyer would want to pick up a set of new gaskets.
Price is $360 shipped in the continental US. PayPal only. I'm AUtigers350z on other forums if you'd like to verify my legitimacy