GMA ENGINEERING BY BDL Rear Caliper - 73-80BT - Classic Black GMA-100B

If you're running classic die-cast rear calipers, you're leaving performance and safety on the table. GMA Engineering's billet aluminum rear caliper delivers superior heat dissipation, consistent brake modulation, and the durability required for serious track work or high-performance street driving. Built to exacting standards with included brackets and pads, this is a straightforward upgrade that transforms your braking system.

The critical difference: older Wagner and Kelsey-Hayes OEM calipers use a 3/4" bore master cylinder and simply won't function correctly with modern brake systems. This GMA unit requires a 5/8" bore master cylinder—the standard for contemporary performance applications—ensuring proper pressure distribution and pedal feel.

• Billet aluminum construction
• Anodized finish (black)
• Hanger brackets included
• Brake pads included
• Requires 5/8" bore master
• Made in the U.S.A.
• Not compatible with imported stainless rotors
• Bolt-on installation