So ive been looking to do some work on my g cuz i love the sound but just isnt loud enough. i have the 2010 g37xs sedan and was thinking about changing the mufflers for a nicer sound, also maybe an intake...anyone have any ideas of where i could get these parts for cheap ?or if anyone has used ones they wanna get rid of for some $$ let me know.

 

There are lots of vendors with threads advertising these items. PM one or several of them for a quote. There's a classified forum with folks selling used parts cheaper than new. Browse through that too.