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1964 - 1974 GM A, F, X Body Front Super Twin 2 piston Disc Brake Drop Spindle Conversion Kit - A123-1ADS


Upgrade your GM A, F and X Body front brakes to aluminum calipers. Our billet aluminum calipers give you the stopping power of a 4-piston caliper without wheel clearance issues.

Maximum braking power with the flexibility of using most 15 inch wheels and weight saving with these high performance aluminum calipers.

  • Kit includes 2-piston SuperTwin HD billet aluminum calipers with stainless steel pistons, caliper mounting brackets, square cut seals, low dust pads, dust boots (DOT Design) and dual bleeders for easy bleeding. master cylinder lines, seals, bearings, grease caps, DOT braided stainless flex hoses, spindle nuts and hardware.
  • The included 9" booster and power brake master cylinder power the light weight calipers.
  • Set of forged 2 inch drop spindles are included.
  • Aluminum calipers are 6 lbs lighter than cast iron calipers for better ride quality
  • Calipers and adjustable proportioning valve are 100% MADE IN USA.
  • Adjustable proportioning valve allows best performance for your rear brakes.
  • Includes Turbo slotted rotors with Xtra Life plating.
  • Optional Big Bite cross drilled and slotted rotors with Xtra Life plating.

Please note that the calipers in this kit are coated with a clear anodize finish. Upgrade to red or black calipers for an additional cost.

Click here to download
Pricing: $1,458.70

Customize Your Item

- Rotor Upgrades -
- Powder Coat Upgrade -

Product Details

Caliper Name: SuperTwin
  • Number Of Pistons: 2
  • Piston Size: 43 mm
  • Constructed From: Billet Aluminum
  • Caliper Standard Finish: Clear Anodize
  • Caliper Optional Finishes: Powder Coat Red or Black
Rotor Details:
  • Diameter: 11 in.
  • Thickness: 1.000 in.
  • Venting: Uni-Directional
  • Rotor Standard Finish: Slotted & Plated, Optional Cross drilled
  • Bolt Pattern: 5x4.75 in.

Replacement Parts

Fitment Notes

  • Will not fit most Pontiac factory wheels.
  • Details

    Shipping Information

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

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