The only input I can offer is that the Greddy Ti-C is 2.75", while the others listed are 2.5". The one that sounds "better" is purely subjective. I have an F.I. TDX.............
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 2007 350Z NISMO #0618: Zerolift | UPREV | F.I. | Greddy | Competition Clutch | Injector Dynamics | Aeromotive | Pioneer | JL
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