i have a 92 prelude the seat dont fold down either, i have a 10" type r in there now and it got noticeably softer in loudness, i had to up the power which was not good for the sub. so i made an enclosure that was tuned higher, so now it gets louder but below 35Hz its starts fading down. its a give or take in a trunk car with a small sub. so if you're selling the car and getting some thing with an open trunk you should be good once you swap cars, if you're sticking with trunk cars, why use an 8" sub?