ohsigmachi
CEG'er
My jaguar has a built in decklid sub enclosure that holds two 6x8 woofers. I've no idea realy what other sizes would fit although I imagine a 6x9 or 6.5 in speaker would fit. Given that info what would you replace them with for better more accurate base while keeping the stock enclosure. I think the enclosure is vented, but again not sure...sorry I usually have more info when I make posts.