I currently have a F.I. TDX w/ 18" resonators. Greddy TT installed and waiting on a F.I. TDX, 3" version. My alternate exhaust choice is the Greddy TiC which is 2.75".
On a side note, if you are going to go the TT route, I would hold off to see the results from the F.I. TT kit. For SC, some have done well with Stillen, but most have gone with GTM (there are other options, but my require some custom work).
Are you leaning toward one forced induction option over another? If so, what is your goal? That may help folks give you options............Good Luck!
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 2007 350Z NISMO #0618: Zerolift | UPREV | F.I. | Greddy | Competition Clutch | Injector Dynamics | Aeromotive | Pioneer | JL
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