2. Crap. (15-20W RMS range would be a high estimate)
3. No. Also, rears are 4", not 5 1/4".
4. You would have to install a new amp. If you went with the factory amp (which would be a waste of money to do so and use those speakers) you wouldn't need them because of the internal amp xover. With a new amp wired in close promimity to the old ones location, simply add wire to connect the amp channel to the xover, then cut the harness of the factory amp and use the existing wire for the mid and tweet.
5. The mid wires go to the 6x9s pos and neg terminals. tape off the tweet wires.
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>