Oh dear oh dear, Listen, dont take this the wrong way. From what you have just posted, my recomendation is not what the person before me said, and no you wont find what you are looking for there, or likely anywhere. You also need to do some homework on car audio and speakers. But if you dont really want to, then I will do my best to help you, I do have a bit of authority on the subject. What reason is it that you want speakers that will handle 4 or 5 hundred watts. What amp are you using, brand, model, speced watts, etc. Also, remember that many cheap amps dont put out what they are rated for, thats a trick they do sell there amps over the better brands. Even the old RMS rule doesnt work, as they found ways to fake that, they use a different measureing system for RMS. Yes it exists, you see you can vary the frequency, and you dont have to give the reliability of the amp that way. See they will say something like 50 x4, but mark 2000 watt amp rms. That kind of crap. Anyway, you also should remember that watts is amps times volts, and amplifiers are between 50 and 80% efficiant, most are much closer to that 50 mark or worse. This means that at 13.8 watts the amount of power you are likely expecting to produce is more than your alternator can produce. Anyway, give me specifics, and Ill do my best to help and educate you into a smart decision.