The door & dash speakers are called component speakers. They have a crossover which sends the optimium signal for each speaker, to the correct speaker.
They're 6.5 inchs in diameter. So what you need to look for are a set of 6.5 inch component speakers.
If you are planning on adding an amp later on, bear this in mind when choosing speakers now. Go for speakers that would suit the sort of amp power rating you would consider getting. As if you buy not very powerful speakers now you'll need to upgrade again when you get an amp.
If you never intend to get an amp ignore the above paragraph.
What budget do you have?
What hu do you have?
