1979–85 Cadillac Eldorado Style Rear Disc Brake Calipers with Emergency Brake, Rear Caliper Set with Emergency Brake Provision, NR172/NR173

1979–85 Cadillac Eldorado Style Rear Disc Brake Calipers with Emergency Brake

 A proven choice for classic rear disc brake conversions, this Pirate Jack rear caliper set is based on the 1979–1985 Cadillac Eldorado-style GM metric rear caliper, a design widely used in aftermarket rear disc brake conversion systems that require an integrated emergency/parking brake provision. These calipers are also commonly associated with the 1979–85 Cadillac Eldorado, Cadillac Seville, Buick Riviera, and Oldsmobile Toronado.

 The calipers feature a built-in mechanical parking brake mechanism, allowing your rear disc brake conversion to retain a functional emergency brake rather than eliminating this important feature. In standard applications, the left- and right-hand calipers are mirrored, with the parking brake mechanisms positioned on opposite sides. This configuration is particularly well suited to many classic vehicles using a non-staggered rear shock arrangement. Each caliper accepts D154-style brake pads and features the commonly used 5-1/2" mounting bolt spacing, making this caliper design a popular component in a wide range of classic GM and custom rear disc brake applications.

 Whether you're replacing worn calipers on an existing conversion or building a new rear disc brake system, this Pirate Jack caliper set provides a proven GM-style solution with integrated emergency brake capability. 

Standard & Staggered-Shock Applications The correct left- or right-hand caliper configuration depends on the vehicle's rear suspension and shock arrangement. In many standard, non-staggered applications, the calipers are installed as a left- and right-hand pair. However, Pirate Jack also uses two right-hand calipers in certain staggered-shock rear disc brake conversion kits. This configuration positions the emergency brake mechanisms correctly for the staggered shock arrangement. 

Pirate Jack staggered-shock kits that use two right-hand calipers include: 

• DBK1012S
• DBK1012SLX
• DBK9S
• DBK9SLX 

Important: Do not assume that a driver-side installation always requires a left-hand caliper. Always verify the caliper configuration required by your specific vehicle or existing conversion kit. 

This caliper set is used in a wide variety of Pirate Jack rear disc brake conversion kits, including: 

• DBK9, DBK9LX, DBK9TRK, DBK9TRKLX, DBK9TRK-HS
• DBK1012, DBK1012LX, DBK1012FS, DBK1012FSLX
• DBK834, DBK834LX, DBKA834, DBKA834LX, DBKE834, DBKE834LX
• DBK8800-5, DBK8800-5LX
• DBK1012TRK, DBK1012TRK-5, DBK1012TRK-LX, DBK1012TRK-5LX
• DBK88, DBK88LX
• DBK7892, DBK7892LX
• DBK7074, DBK7074LX
• DBK7581, DBK7581LX 

Features 

• 1979–1985 Cadillac Eldorado-style rear caliper
• Designed for rear disc brake applications with an emergency/parking brake
• Integrated mechanical parking brake mechanism
• LH and RH mirrored caliper configurations
• 5-1/2" mounting bolt spacing
• Accepts D154-style brake pads
• Popular GM metric-style rear caliper design
• Widely used in classic car and truck rear disc brake conversions
• Used in both standard and staggered-shock applications
• Excellent replacement for worn, leaking, or damaged conversion-kit calipers
• Ideal for applications where retaining a functional emergency brake is important 

Important Fitment Information 

Please verify caliper configuration, mounting dimensions, rotor compatibility, brake hose connection, and parking-brake cable routing before ordering. This caliper design is used across many different rear disc brake conversions, but the correct configuration can vary depending on the vehicle's suspension and rear shock arrangement. Standard applications typically use one left-hand and one right-hand caliper, while certain staggered-shock applications use two right-hand calipers. For replacement applications, we recommend comparing your existing caliper and verifying the Pirate Jack conversion kit part number before ordering.