What is involved in this process? Anywhere I can purchase the required parts? Who wants single piston calipers anyway!
Thanks.

 

If you drive a second generation Rx7 the parts needed for the swap are:

4 Piston Calipers Rebuilt
Caliper Medal Brake Line
Caliper shims and brake pad holders
A rotor designed for the 4 piston caliper (Brembos)

Brake Line Hose (Steel Braided)
Brake Fluid (dot 5.1)
Brake Pads

The difference is great, I was able to lock up thr tires while in motion of 80Km/l at autox.

 

that's if you already have 5 bolt... if you have 4 bolt rims. you need new hub's and rims too.