2" Drop Wilwood Front & Rear Disc Brake Kit Booster Conversion Kit, GM 64-72

Pirate Jack 1964–72 GM A-Body 4-Wheel Disc Brake Conversion Kit, with 2" Drop Spindles, Black Wilwood® Calipers and Power Booster | Chevelle, GTO, Cutlass, Skylark

Four-wheel discs, a 2" drop and power assist, all in one complete kit.

Most disc brake conversions only cover the front and leave you to figure out the rest. This Pirate Jack kit converts both axles, lowers the front of your car 2" with drop spindles, and adds a complete power brake setup, all designed to work together on your 1964–72 GM A-Body. It fits Chevelle, El Camino and Monte Carlo, Cutlass, 442 and Vista Cruiser, GTO, LeMans and Tempest, and Skylark and Special. Black calipers give it a clean, understated look. Every part is brand new, with nothing rebuilt or remanufactured.

Four-wheel disc stopping power
The front brakes use 11" cross-drilled and slotted rotors with a 5 x 4.75" bolt pattern. Black Wilwood® D52 dual-piston calipers (part number 120-10937-BK) bolt on in place of the factory single-piston calipers. They have forged billet aluminum bodies, stainless steel pistons and high-temperature seals, so you’re done with the rust, pitted bores and leaking seals of the original design, and you save a lot of weight. They use standard Wilwood D52 brake pads. In the rear, large-bore GM single-piston calipers are powder coated and include a working parking brake.

2" drop spindles, with no spring cutting
Coated 2" drop spindles lower the front of your car without cutting springs or changing your suspension geometry. You get a lower, more aggressive stance and a lower center of gravity at the same time you upgrade your brakes.

A complete power brake system

• 8" dual diaphragm booster, powder coated black
• Pedal rod and attachments
• Firewall brackets
• Adjustable proportioning valve, so you can dial in your front-to-rear brake balance

Stainless braided hoses, front and rear
Stainless steel braided brake hoses come with banjo bolts and copper crush washers, front and rear. Many other kits leave these out.

Complete Kit Includes

• 11" cross-drilled and slotted front rotors (5 x 4.75" bolt pattern)
• Front black Wilwood® D52 dual-piston calipers (120-10937-BK)
• Rear large-bore GM single-piston calipers, powder coated, with parking brake
• Front and rear caliper brackets
• Front dust shields
• 2" drop coated spindles
• Front and rear stainless steel braided brake hoses, with banjo bolts and copper crush washers
• Bearings, seals, dust caps, spindle nuts, spindle washers and all hardware
• 8" dual black powder-coated power brake booster
• Pedal rod and attachments
• Firewall brackets
• Adjustable proportioning valve with 3/8" fittings

Fitment: 1964–1972 GM A-Body

• Chevrolet: Chevelle, El Camino, Monte Carlo (1970–72)
• Oldsmobile: Cutlass, 442, F-85, Vista Cruiser
• Pontiac: GTO, LeMans, Tempest
• Buick: Skylark, Special

Before You Order

• Rear shocks: The rear conversion is designed for non-staggered shocks. If your car has staggered shocks, say so in the order notes at checkout and we’ll include the correct brackets.
• Rear axle: This kit does not fit Moser rear ends. The axle flange can be no more than 6.11" in diameter to fit the rotor hat, with a .050" x 45° chamfer and a 2.786" maximum axle register.
• Wheels: You’ll need 15" or larger wheels.
• Track width: Disc brake conversions typically add about 1/4" to 3/8" of offset per side.
• Proportioning valve: Install the valve in the rear brake line. The 3/8" fittings come with the valve.
• Alignment: Have a front-end alignment done after you install the spindles.

Easy-to-Find Replacement Parts
You won’t be stuck buying overpriced pads and rotors made only for one company’s kit. Replacement pads, rotors, ball joints and more cross-reference to common parts you can get at your local auto parts store. The part numbers are listed on page 2 of your instructions.

Custom-Built by Pirate Jack

• Red calipers: Want red instead? We offer this kit with red calipers too.
• Other changes: Need something else changed? We’ll build the kit to fit your car.
• Support: Instructions are included, every part is brand new, and we back every part with a 1-year warranty.

Questions? Give us a call! Free tech support is available Monday through Friday, 8:00 AM to 4:00 PM EST. Call us at 866-601-4455.

Stop better, sit lower and look great doing it. Order your A-Body kit from Pirate Jack today.