Even though it's not a 7, I'm sure the same will apply to 7 headrest speakers as in my miata's... Even if you can put a deck in through the stock amp to stock speakers, why would you want to? The headrest speakers are just paper coned, foam (not rubber) surrounded speakers that have a tendancy to deteriorate after 12 or so years.. I was able to fit a pair of audiobahn 3.5" speakers in the miata, with only minor cutting of the foam (just a slot for the wiring section). These are the type with the removable tweeter, I put it on the speakers for now, although I'll probably figure out where to put the tweeters so I get better audio out of them. I was able to get two sets of these speakers for less than 80 bucks off of ebay.. They're last year's model, but I don't really care, since they were still new in box.. They sound pretty decent, too.