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GM A, F, X Body Front Power Disc Brake Conversion Kit - A123-1


Simple and complete premium drum to disc brake conversion kit gives you original looking disc brakes.

Simple bolt on instructions and all the parts you need to convert from drum to disc brakes.

  • Zinc plated calipers with period correct inlet. New slider pins and anti rattle clips.
  • Complete with 9 in. booster, master cylinder, standard forged ride height spindles, USA made carbon metallic pads, original style caliper mounting brackets and splash shields.
  • SSBC adjustable proportioning valve. We use our USA made adjustable proportioning valve rather than the GM style combination valve for this kit. Our valve allows adjustment that results in better performing rear brakes. Our valve requires no additional plugs or fittings and is much easier to plumb and bleed.
  • Kit also comes with disc brake adapter lines, grease seals, bearings, grease caps, DOT rubber flex hoses, spindle nuts and hardware.
  • 11" rotors included with optional Turbo slotted or Big Bite cross drilled and slotted rotors, both with Xtra Life plating
  • NOTE: Will not fit some factory 14" wheels including most Pontiac factory wheels. 15 Wheels suggested. for those 14" wheels look at kits A123-22 and A123-23

Click here to download
REMINDER! Please do not purchase this kit without reviewing the wheel fitment diagram.
Pricing: $923.02

Customize Your Item

- Rotor Upgrades -


Caliper Details
  • Caliper Name: GM Full size
  • Number Of Pistons: 1
  • Piston Size: 72 mm
  • Constructed From: Cast Iron
  • Caliper Standard Finish: zinc plated
  • Caliper Optional Finishes: Red Black: Call
Rotor Details
  • Diameter: 11 in./li>
  • Thickness: 1.000 in.
  • Venting: Uni-Directional
  • Rotor Standard Finish: Standard
  • Bolt Pattern: 5x4.75 in.

Replacement Parts

    Replacement pads:


Shipping Information

  • Item Requires Shipping
  • 119.0 lbs.
  • W17.0000” x H13.0000” x L32.0000”

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