I have the 18" res version. Stock cats for now. I think it sounds like the 350Z did stock now, but it is only loud at cold start and WOT like the others stated. For my next one, I will prolly go non-res. Gotta prep for TT baby..........
__________________
 2007 350Z NISMO #0618: Zerolift | UPREV | F.I. | Greddy | Competition Clutch | Injector Dynamics | Aeromotive | Pioneer | JL
|