I have a new Infiniti that I just purchased I want to modify it now I wanna know best exhaust sound, cooler intake, headers, came to use I want to use it as a daily driver but atleast push 450 to the wheels with it still being reliable someone please give me some tips

 

Welcome to the site, pushing 450 isn't going to happen w/ bolt-ons, you'd need to look into forced induction. Check this folder for more info, and for the other mods you listed there's folders for them too.
Engine, Drivetrain & Forced-Induction - MyG37

 

You also need to learn the correct location to make a new thread.