Yea, I've got the 3-ways in all 4 doors. I have the same headunit as 4cyl. Definte power. I can shake my side mirrors, rear view mirrors, and I can feel the bass in my entire seat. I don't run an amp to em', but they do get distorted with LOW bass, or on a high volume. It handles mid-range bass best.
200 bucks, and I did the installation myself. IMO, get them. No modifications to install them, just unplug old speakers, put new ones in, put door on, BOOOM BOOOOOOOOM!!

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Andy
littlefishie@mail.com 97 GL T-Red W/
Pioneer 3100 HU/Pioneer 6x8s 3 Ways (All doors)
SE Michigan
http://pmipog.hypermart.net