well there's not really much point in replacing JUST those. i don't even know if the stock setup has a crossover. the dash speakers are ONLY for tweeters. you will not get any decent mid-bass or whatever else from replacing just those. furthermore any replacement tweeters will probably need a crossover. then there's the problem of running the wires. i think the stock front speakers (tweeter/door) are connected in parallel. there is not a separate output from your radio for the tweeters. there's only 4 outputs (front left, front right, back left, back right). it is not made to have an aftermarket tweets and the stock door speaker. i think people have bought cheapo tweeters off ebay for kicks to plop in there but nothing to make any mentionable improvements in sound quality. if you want better sound but don't want to buy components forget about the dash speakers and replace your door speakers. most people with aftermarkets speakers in our cars don't have anything in the dash anyways.

-marc