Rebel RSR Products 930 Inner Caliper Halves (sold as a PAIR)
 
Fitment:  Adapts Porsche 930 Rear Calipers (part#930-352-092-00, 930-352-092-01, 930-352-092-02, 930-352-092-03, 930-352-091-00, 930-352-091-01, 930-352-091-02, 930-352-091-03) to fit 911 or 914 rear trailing arms with 3 inch bolt spacing.
 
These peices of precision artwork are machined from billet 6061 aluminum (not castings) and anodized black to match the factory Porsche/Brembo 930 mating parts.  A mixture of early and late 930 design features were chosen in our design to capture the best overall look and function regarding heat displacement, expansion rates, and thread depth for hydraulic ports.  We even added a seal removal provision so you won't end up marring the counterbores if the wiper seals ever need to be removed and replaced.  The piston bore and seal groove are machined exactly to Porsche/Brembo specifications, ensuring that the pistons retract the correct distance with static system pressure.   
 
If you want to install Porsche/Brembo 930 rear calipers on a 911 (non-turbo) or 914, this is the quickest, cleanest, and easiest solution.  Not to mention you get to retain the Porsche logo script that is a timeless signature of the 930 calipers.  These new inner caliper halves easily replace their counterparts with minimal labor.  Per each caliper you will need to remove (4) 12mm allen bolts, bleed screw, crossover tube, and (2) pistons.  The new caliper halves come with stainless steel brake lines and caliper to trailing arm mounting hardware to make the conversion seamless and simple.
 
Assembly procedure consists of installing (4) pressure seals (Porsche part# 930 352 553 02), (4) scraper/wiper rings (Porsche part# 930 352 554 00), and reinstalling the pistons, bleeder screw, crossover tube, and 12mm allen bolts.  The stainless steel brake lines supplied with the kit are to be used with (2) banjo bolts (Porsche part# 999 135 002 02) that will also need to be sourced from Porsche or reused from the original calipers.
 
In contrast to the 930 rear caliper modifications we offer here https://www.rsrproducts.com/product-page/930-to-911-rear-caliper-modification (for those who would like to modify what they already have), these new caliper inner halves provide a purpose built replacement that does not involve permanent modification to the factory parts, this way you can save your original parts on a shelf in case they are ever needed or desired in the future.
 
Kit Includes:
(2) New Inner Caliper Halves w/ 3.0" bolt spacing (Left and Right).
(2) Stainless Steel braided brake hoses with banjo loop end + OEM connection M10x1.0 female end.
(4) Sealing copper washers.
(1) Caliper to Trailing Arm Mounting Hardware Kit.
 
930 rear brake rotor set is also available here:  https://www.rsrproducts.com/product-page/930-rear-brake-rotors-r-l-pair