Originally Posted by XwChriswX

No mod can void your warranty unless that mod specifically impacted the defect. i.e. You did a brake upgrade, and your brake system goes tits up. So there's not much to worry about if you're just doing basic bolt on breather mods.

As for Nismo parts, most installers will do those parts and probably still cover them under warranty if installed at the dealer. But nismo parts are not worth the cost vs gain. There's much better out there for the same price if not slightly more or less.