my parents have huge speakers 15 by 45 i think and they have 2 they would JUST fix in my trunk im wondering if i take my sub box stuff out and put those in would it sound awesome or no?? they have 5 speakers and all dif sizes anybody no if it would sound good or what?

__________________
99 DARK BRONZEMIST METALLIC GTP SUPERCHARGED SEDAN. --MODS-- FWI, 104 plugs MSD coils and wires, 180 t-stat, dual thrush exhaust, Kenwood complete system 10' Sub ported, raised spoiler, red calis, D/S Baer rotors, Hawk Pads.