RX-7 4 Piston Front Calipers
 

I have a pair of 4 piston RX-7 front calipers for sale. I was going to use these on my 91 but lost interest and need the cash for an upcoming track day. $75 obo + shipping and they are yours.
PM me with email address if you would like more pictures.
http://carphotos.cardomain.com/ride_...4034_large.jpg

Will these work on my 2001 with sports brakes?

These are not what you would call a bolt on swap, no. Do a couple of searches and see what other people have done to get an idea of what work would be needed to make these work.