I have the Pioneer 6857 which are 2 ways, just guessing the 6867's are probably 3 ways. The 2-ways sound good and have a good range. Since they handle 50 watts RMS they matched my 50wattx4 sony head unit. I would recommend upgrading head unit and speakers, because you would probably either over-power stock speakers(22 watt RMS) or underpower aftermarket speakers. Check out efficiency and what wattage they are. Higher efficiency can run on lower watts. Match up speakers with head unit, so they're not under/over powered. Need more advice? Talk to someone at a electronics/audio store and go to
www.crutchfield.com , though don't buy from them(too expensive).
