Paul,
 
What size are the pistons in the RX7 caliper?  I've been a googlin' but seen some conflicting info.  Hoping they are about 1.5" (38.1mm).
 
Also, based on that googling session, it appears that the Series 2 and 3 brakes are essentially the same (although cosmetically different) but for the disc size used, the Series 3 (FD) being larger.  Do you whether that is true, and hence whether Series 2 brakes could be used with your brackets?
 
Anybody know what RX7 calipers are selling for these days?
 
Thanks.

Hi. No they're 4 x 36mm bores. Yes the series 2 (FC) and series 3 (FD) are identical apart from the external cosmetic differences.

I found people wanting way too much ($300-400) for them here in Australia. As most you would want to do a full overhaul of them anyway..
I just bought mine from the US via ebay. Then got them Soda blasted, and repainted them myself.
Something like this (these seam a bit grubby though but obviously you'd just need to clean them up).
http://www.ebay.com.au/it...p;_uhb=1#ht_2713wt_986
 
Then you'll need an overhaul kit.
http://www.ebay.com.au/it...=1#ht_2163wt_986 
 
Just keep an eye open online and at wreckers, there actually seems to be a couple cheaper ones on ebay at the moment locally. 
But unless they are fully refurbished and overhauled i wouldnt really want to pay any more than $200..?
http://www.ebay.com.au/sc...ipers&LH_PrefLoc=1

Hi Paul , are these still available Mazda rx7 caliper adapter brackets , cheers