couple of quick questions i need answerd... i have a 02 6spd with tech. ecu..intake..spacers...bop..headers..test pipe and catback

i want a 3.5inch intake ...can i do a 3.5 inch intake with the stock maf housing and get the same power?... reason why is i dont want to change the maf houseing so i dont have to change the afr on idle

2. with my mods is 350z injectors and a walbro fuel pump over kill?