Ok, just to let you know I have owned 4 1990-96 z32's and all I went with was 1 JL 10W0 in a 10" Bazooka tube / 500X1 JL Amp / Infinity kapa's in stock locations and that was insane. The hatch is like a concert hall for sound, and if the speaker is placed in a good spot and well insulated (dynomat) the SPL's are amplified even more. And the FACT that JL Audio is the SHIT teamed with a hatchbachk (300z) I think you should be fine. And if you want to blow people away like I wanted to I think it would be good if you went with a plexigalss hatch window and my choice of Viper 15's with nothing less than a 1000w amp then no body will be able to sit inside your car and breath at the same time. LOL!!! I used only one of mine and it blew out my hatch window like a stick of DY-NO-MITE!!! If you want to kill'em make sure you kill'em "DEAD". Like I tell me girl all the time "If you got it, play it loud or don't play at all." cuz once you start just like everything thing in life "Enough will never be Enough".