GM 10 & 12 Bolt Bolt-On Rear Disc Brake Conversion Kit, Caliper/E-Brake Options

Upgrade your GM 10‑ and 12‑bolt rear axle with this all‑in‑one disc brake conversion kit , engineered for classic midsize GM vehicles and designed to deliver superior performance, ease of installation, and long-term reliability.

• Zinc‑coated drilled & slotted rotors offer enhanced heat dissipation, corrosion resistance, and improved stopping power.
  
• 5‑lug bolt patterns supported : compatible with 5×4.5″, 5×4.75″, and 5×5″ wheels.
  
• Black powder‑coated bolt‑on caliper brackets : rugged, stylish, and no welding required for installation on standard flange housings.
  
• Silver Zinc-coated or Black Powder-coated GM metric single‑piston calipers with pads included : match factory-style braking and deliver smooth, reliable stopping power.
• Stainless steel brake lines pre‑plumbed or supplied for a durable, maintenance‑free install.
  
• Full hardware kit included for fast, hassle‑free conversion—brackets, rotors, calipers, pads, lines, and mounting bolts.
  
• Bolt‑on, no welding required , with a typical install time of just a few hours.
  
  

Fitment & Compatibility

This kit fits GM midsize rear ends including :

• Buick Skylark (1964-77)
  
• Chevy Chevelle (\'64-\'73)
  
• Chevy Nova/Chevy II (\'64-\'79)
  
• Chevy El Camino (\'64-\'77)
  
• Camaro (\'67-\'69)
  
• Monte Carlo (\'70-\'77)
  
• Oldsmobile 442 & Cutlass (\'64-\'77)
  
• Pontiac GTO, LeMans, Tempest (\'64-\'73, \'64-\'77, \'64-\'70 respectively)
  

Important : Does not fit full‑size GM cars (e.g. Bel Air, Impala), pickups, 7.5″ 10‑bolt axles, or rear ends with staggered shock mounting .

Axle Flange Requirements

Ensure your axle meets these critical dimensions for bracket fitment:

• Top bolt holes : 3‑1/8″ center‑to‑center
  
• Bottom bolt holes : 2‑11/16″ center‑to‑center
  
• Vertical spacing : 2‑7/16″ between top and bottom bolt centers
  
  

Why Choose This Kit?

• Superior braking performance over stock rear drums—modernized stopping power for vintage vehicles.
  
• Bolts directly to your existing housing —no fabrication or welding needed.
  
• Includes GM metric calipers, pads, brake lines, and premium rotor hardware , saving you additional purchases.
  
• Offers flexible wheel options thanks to multi-pattern bolt spacing.
  
• Clean, corrosion-resistant finish from zinc plating and black powder coating.
  
  

Kit Contents

• Zinc‑coated drilled & slotted rotors (vented, 11.25″ diameter)
  
• Multi‑pattern rotor bolt configuration (5×4.5″, 5×4.75″, 5×5″)
  
• Black powder‑coated bolt‑on caliper brackets
  
• Silver Zinc-coated GM metric single‑piston calipers with pads, optional: e-brake calipers
• Optional: E-brake cables
• Stainless steel brake lines
  
• Full set of installation hardware , including bolts and mounting components
  
  

Note Before Ordering

• Not compatible with full‑size Chevy/GMC cars (e.g. Biscayne, Bel Air, Impala). If your vehicle is one of these, this kit is available here .
• Not compatible with pickup truck rear ends , 7.5″ 10‑bolt , or staggered-shock housings .
  
• Confirm your flange meets the listed dimensions before purchasing.