1962-1972 Mopar A Body Premium Disc Brake Conversion Kit & Chrome Booster Conversion 5x4 Bolt Pattern

Mopar A-Body Show-Quality Power Disc Brake Conversion Kit: Drilled & Slotted Rotors, Chrome Booster, Corvette-Style Master Cylinder, Small Bolt Pattern (5 x 4")

Power disc brakes that look as good as they stop. Bolts on, no new control arms needed.

When you pop the hood and look through the wheels, this kit makes a statement. It pairs drilled and slotted rotors with a chrome power brake booster and a chrome Corvette-style master cylinder, so your A-body gets real stopping power and a look built for car shows.

Like all our redesigned A-body kits, it's made from all-new parts and bolts onto your existing control arms. That can save you 25% or more compared to conversions that make you replace them.

Drilled and slotted rotors
The 11" drilled and slotted rotors give you the aggressive, high-performance look that shows through open-spoke wheels. They also help vent heat and gases during hard stops, for more consistent braking pedal after pedal.

Chrome booster on a raised offset bracket
The chrome 7" power brake booster mounts on our special offset bracket, which raises it up to clear the tight space under an A-body hood. You get power assist and a bright, polished look without fighting for room around the steering box, exhaust or valve cover.

Chrome Corvette-style master cylinder
The chrome Corvette-style master cylinder, with its classic finned cover, finishes off the look. It's one of the most recognized master cylinder styles in the hobby, and it looks right at home in a show engine bay.

Brake balance you control
The included adjustable proportioning valve lets you fine-tune front-to-rear brake bias, so you can keep the rear wheels from locking up early and dial in balanced, predictable stops.

⚠️ Before you order: confirm two things

1. Your bolt pattern is 5 x 4" (small bolt pattern)
This kit is for the 5 x 4" small bolt pattern found on many early-'60s A-bodies. We also offer a 5 x 4.5" version, so make sure you order the one that matches your car.

How to check: on a 5-lug hub, measure from the center of one stud to the outside edge of the stud across from it (skip the one next to it). About 4" means you need this kit. About 4-1/2" means you need the 5 x 4.5" kit.

2. Your wheels will clear the calipers
This kit fits most 14" wheels, but not the very narrowest 14" wheels Mopar ever made. Your wheels must have:

• At least 13.25" inside diameter, measured across the inside of the barrel
• At least 4" backspacing

How to check backspacing: lay the wheel face down, set a straightedge across the back rim lip, and measure straight down to the mounting pad where the wheel touches the hub. A wheel that falls short on either measurement won't clear the calipers.

What's in the kit

Front disc brake hardware

• 11" drilled and slotted rotors, 5 x 4" bolt pattern
• Loaded large calipers
• Lower ball joints
• Spindle sleeve adapters
• Stock-height spindles
• Backing plates
• Rubber brake hoses
• Bearings, seals and dust caps
• All mounting hardware

Power brake package

• 7" chrome power brake booster
• Offset raised mounting bracket for A-body clearance
• Chrome Corvette-style master cylinder
• Adjustable proportioning valve

Why choose this kit

• Show-car looks: drilled and slotted rotors plus a chrome booster and master cylinder.
• Power assist: less pedal effort and confident stopping.
• Made to fit: the compact booster and raised offset bracket clear the tight A-body engine bay.
• Adjustable brake bias: tune front-to-rear balance for your car.
• Bolt-on conversion: keeps your original control arms.
• Saves you money: 25% or more compared to kits that need new control arms.
• Complete package: front disc hardware, booster, bracket, master cylinder and proportioning valve in one box.

Please measure before you buy. Checking your bolt pattern and wheels is the buyer's responsibility. Returns are accepted, but the buyer pays return shipping plus a 15% restocking fee on any returned kit.