Depends what you want: a bit more power or just some bling or both?
Modding the 370 is really not my forte (as I had a 350) but I know you can get things like a Stillen crank pulley (bling & more power), better coil packs, earthing kits, air induction kits (which you've got), engine bay bolt kits (nice bit of bling), silicone hoses (lots of colours available/bling), AAM intake manifolds (not sure if others available/more power & bling), strut brace (not sure if available for 370 but I'd guess so), hydro dip parts (plastic covers etc), etc, etc.
Personally I'd have a good look through the "370Z members builds" for inspiration as well as googling "370Z modified engine bay" or similar to see what pops up.
Hope that's helped a little.