So I'm about to put a cat back on my 2004 g35 sedan (not g35x), and was wondering if applying a dual cat back like the spec D has to offer, will I have to do any additional work since the factory setup is just a single? And if anyone has this set-up, thoughts and opinions on it?
Link to cat-back: http://www.carid.com/2004-infiniti-g...-12205511.html

 

that system is specifically designed for the coupe. . . you will have to modify the sedan (move EVAP canister) for it to fit. There are better options for the sedan. . . do a search on this forum.