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GM Rear Calipers For A, F, X Body

NR172 / NR173
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Product Description



Rear E Brake GM Caliper

  • Self Adjusting E-Brake Mechanical Mechanism
  • Single Piston
  • 10mm Hose thread
  • Pre-Loaded with Graphite Metallic Pads
  • Pad replacements D154
  • 1979 El Dorado Style
  • Used on Rear GM, Ford, Mopar kits we carry
  • NR172 (Driver)
  • NR173 (Passenger)

** Must use E-Brake Cable for self adjusting mechanism to work properly.


NOTE: If you are using these rear calipers there are some important things you should know. One of the biggest advantages of a disc brake system is the fool proof self adjuster. Not so with this rear GM system. The rear calipers adjust off the parking brake. The parking brake is incorporated into the caliper. You must set the parking brake every time you park the car.The rear caliper pitons utilize a one way clutch inside the caliper piston. When the parking brake is applied the clutch senses when there is .030" or more clearance between the friction material and the rotor on the inboard side. When there is more than .030" the clutch turns inside the piston adjusting it out keeping the rear brakes adjusted. If you do not set your parking brake every time you will start to lose brake pedal (low and spongy) and the adjuster mechanism will not work any longer.

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