This complete kit adapts Brembo/Porsche 4 piston Boxter rear calipers to stock 911 rear trailing (banana) arms (69-89) with 3.0" bolt spacing.  Can be used with aluminum or steel trailing arms.  Designed to work with 20mm wide rear rotors (69-83) but can be modified to work with 24mm wide "Carrera" rotors (84-89).  When installing this kit onto aluminum arms the small upper backing plate tab must be cut off each arm for clearance.
 
CNC machined
Anodized for great durability
High quality metric hardware included
DOT stainless steel braided lines included with grommets and banjo bolts
We can provide the calipers (new or used) and high quality German made rotors if you need them.