Own a 01 CL-S and have an eclipse aftermarket head unit already in...just bought the basslink II with the amp expansion card. Not sure what size and restrictions there are for factory fit...assuming there is 6.5 component in front and 6x9 in rear deck. Any help / suggestions would be appreciated. I am looking to spend under 200 for fronts and under 150 for rears. polk audio (db or momo) found good deals...

 

6.5 comps will fit in the doors but you will most likely need a lift ring.

6x9s are the rear size, but it's tough to find some that fit directly because of the torsion bars in the trunk. You need to find speakers with small magnets.

Or you can just ditch the rears and put more money into the front setup (recommended).