i have an Infiniti I30 which is just a maxima and i have my doubts about you getting an 8.5cuft box in that trunck while being able to pull it out... i have a 4cuft in the trunk now and i got it in but i have yet to be able to get it out...i tried a few times...lol Next time i'm just gonna pull the woofers out first... IMHO i think you can get away with in and around 5cubes and still pull it in and out but not 8.5...:eek: