1968-1969 Pontiac Firebird GM 10 & 12 Bolt Bolt-On Rear Disc Brake Conversion For Sale - New and Used

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.

Key Features & Highlights

• 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 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 :

• Pontiac Firebird (1968-69)
• 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 and/or e-brake cables available )
• 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.

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