dmw16

I went on crutchfield and Bestbuy and used their fitment guide. According to those there are only a few 6.5" speakers that fit. Are they accurate?

xviper

Go to Lucid Automotive site. He specializes in speakers that "fit" the S2000. Even if you don't buy from him, you can see what there is. Some are drop in and some require an adaptor kit.

smurf2k

with only slight modifications you can make most speakers fit

dmw16

What sort of modifications?

xviper

Cutting out the speaker baskets and using an adaptor ring.

smurf2k

clearance issues... the speakers can be too deep (get in the way of the window), too large (for protective baffle/basket), and/or doesnt screw to stock adaptor (though they should come with some custom adaptor rings)

MacGyver

See the link in my sig line... I have a diagram with useful dimensions.