Well if your talking baout the integra another problem with kicks is that the computer for the car is in the passenger side kick. This can be a hassle to get around. qforms makes a kit for then integ and is 200 but will probably need reinforcement from what i hear. They will take away the dead pedal. here is an example of kicks that kept the dead pedal and i like http://www.sounddomain.com/member_pa...co%20Amplifier

I got quoted 400 do them form a shop though. Factory placement is ok but kicks would help a fair amount IF DONE RIGHT. Depends how picky you are.