Just wondering if I could swap in some 04+ headlights into my 00 with the stock bumper? i've seen threads relating to it,, but couldn't find them in a search...

 

yes

 

Fitting the 04+ headlights in a earlier model/year S consist of the brackets, not bumper.

 

I believe the brackets and everything are the same. The only difference would be if you just bought the housings you'd need to modify them a bit to get it to fit with the larger Ap1 ballast. If you bought them with the Ap2 ballasts though it would be straight bolt on. Ap2 Headlight Conversion