[CaliforniaTitan]

It is my understanding that if you do modify that yes, you will loose factory coverage under that related area of the modification.

Example - Throw a supercharger on it right now and I am sure you will loose coverage on the drivetrain but it would not say void it on the electronics etc.

A good guideline sometimes is to follow what is being offered on the nissan parts sites and in the dealers parts departments. If they carry what you have done, then most times your arguement can stand on that basis.

Also, any other mods you may contemplate, see if the mfg provides a warranty. Especially if your paying an installation fee.

You will notice that NISMO is the stuff for nissans like TRD is for toyota.
Expect to see some stuff come out from them for the Titan.

Chris