I'd like to upgrade my brakes, rotors and calipers/pads, to something that looks better with at least the same performance as the original. The original equip looks pretty bad with the 19" sport package wheels. Does anyone know of a package thats available. Would this void any portion of the warranty?

You could put on Z32 calipers if you wanted... you wouldnt really gain anything as far as performance... You also could put the brembo brakes on from the brembo-equipped G35s!

Nissan doesn't usually void a warranty, they just refuse to pay the dealer for things that they think are caused by you , so the dealer refuses to do the work without payment. What I'm saying is they never send you a written your Warranty is void notice.

Anything you CHANGE from oem is not covered and anything closely associated with that change may be resisted.

If you change calipers I would not warranty any failure of ABS, TCS, wheel sensors, wheel bearings, hubs, rotor, brake lines.............things that feed the changed part.

To avoid stress and hassles why not wait the 4 years until the primary warranty is over...........then hack it up anyway you want.