Will not fit anything from 03" to 06" for 350z.
But if u want to install into 03"-06" 350z....
If u are willing to cut the OEM front engine strut footing to allow fitment (it will slide under the strut place holder if u have plenum spacer), shave off some plastic for radiator support, lower the coolant expansion tank, lower the air box by 1" ( not needed for after market air filter), reposition the MAF sensor plug to the bottom, ream out the holes on the H brace footing to allow more wiggle,.