55-57 Chevy 2" Disc Brake Conversion Kit W/ Wilwood Calipers

Upgrade your Tri-Five Chevy's handling and stopping power with drop spindles and brakes you can count on, all while staying on a budget.

Kit Includes:

• (1) Pair of 1955-57 Chevy 2" Drop Spindles
• (1) Pair of 1955-57 Caliper Brackets
• (1) Bolt Kit for 1955-57 Drop Spindle to Caliper
• (2) 1979-1981 GM Midsize 10 1/2 Inch Disc Brake Rotors
• (1) Wilwood D154 LH Brake Caliper, 7/16-20 Inlet
• (1) Wilwood D154 RH Brake Caliper, 7/16-20 Inlet
• (1) Set of Speedway Soft Street Brake Pads, GM Metric 1978-Up D154
• (2) Speedway Replacement Inner Seals
• (2) Inner Wheel Bearing Cones
• (2) Outer Wheel Bearing Cones
• (1) Spindle Nut Kit for Speedway GM Spindles
• (1) Front Disc Brake Hardware Kit
• (1) GM/Corvette Cast Iron Master Cylinder, 1 Inch Bore
• (1) GM Disc/Drum Proportioning Valve for 3/8-24 Outlets

Learn more about the products chosen and why we recommend them for your Tri-5 Chevy, here:Drop Spindle Install and Disc Brake Conversion on a 55 Chevy

1955-57 Chevy 2" Drop Spindles, Aftermarket Disc Brake Kit

• 1955-57 Chevy 2" dropped spindles for use with aftermarket disc brake conversion kits
• 2" drop built in
• Cannot be used with stock drums or brake conversion for stock type spindle
• Completes both sides
• Maintains factory steering and suspension geometry
• Track width is increased over stock O/E front end width by 3/4" overall or 3/8" per side

Ideal for use in conjunction with the following Wilwood brake kit for Heidts Tri-5 drop spindle application:

• 4-piston 12.19" rotor kit #140-12306

1955-57 Caliper Brackets

• These caliper brackets have a zinc finish
• Steel design is engineered for quality as well as durability
• .38" material thickness
Foundry

Bolt Kit for 1955-57 Drop Spindle to Caliper

• Use these bolt kits to mount your drop spindle conversion to calipers
• Designed for use with 1955-57 Chevy

1979-1981 GM Midsize 10 1/2 Inch Disc Brake Rotors

• 10-1/2" rotors (O.E. on 1979-81 GM Midsize: Malibu, Monte Carlo, Cutlass, Regal, etc.)
• 5 x 4-3/4" bolt pattern

Wilwood D154 LH/RH Brake Calipers, 7/16-20 Inlet

• Wilwood D154 dual-piston calipers
• No core charge required
• 7/16"-20 inlet
• 5-1/2" Mount Spacing
• Can be usedwith brake hoses from Pre-1978 GM intermediate cars
• UtilizesGM metric style D154brake pads

Speedway Soft Street Brake Pads, GM Metric 1978-Up D154

• Speedway soft brake pad for D154 Wilwood calipers
• One set outfits two calipers
• Tech Tip: Only use full metallic pads on coated rotors

Learn how to properly Bed-In your brake pads by reading our tech article. Bedding-In Brake Pad Procedure.

Speedway Replacement Inner Seals

• 2.00" x 2.56" x .234"

Spindle Nut Kit for Speedway GM Spindles

• Includes a pair of castle nuts, washers and cotter pins
• Castle Nut: 3/4"-20 (not SAE, which is 16 TPI)
• Overall Height: 0.505"
• Height up to the bottom of the castellated notch: 0.276"
• Wrench size for nut: 1.00"

These dimensions are approximate. Certain brake kits may require removal of some of the nut material to allow for installation of the cotter pin.

GM/Corvette Cast Iron Master Cylinder, 1 Inch Bore

• High-tech Corvette-stylemaster cylinders designed using OE specifications and 100% tested
• The wide body and low profile gives this master cylinder the clearance you need when installing in tight areas and yet it maintains a large volume of fluid necessary for 2 and 4 wheel disc brake applications
• 1" bore
• Has 9/16" and 1/2" ports on both sides of the master cylinder
• Works with power or manual brake systems
• Suited disc/drum combinations
• Has a piston adaptor that will allow for power or manual applications

Learn more about selecting the proper master cylinder for your vehicle by reading our tech article.Brake System Selection.

 

GM Disc/Drum Proportioning Valve for 3/8-24 Outlets

These proportioning valves are similar to what GM used on many cars in the 70s.

• Non-adjustable and may require an adjustable valve in the rear brakes (if needed)
• Block incorporates metering (for front brakes) and proportioning (for rear brakes) into one unit
• For use withfront disc, rear drumbrake systems
• Includes hard lines to connect to a master cylinder with 3/8"-24 outlets

Notes:

• Bottom Front Port: 3/8"-24 IFF threads - goes to one front brake
• Top Front Port: 3/8"-24 IFF threads - goes to one front brake
• Middle Top Port: 1/2"-20 IFF threads - comes from master cylinder
• Rear Top Port: 7/16"-24 IFF threads - comes from the master cylinder
• Rear Most Port: 9/16"-18 IFF threads - goes to rear brakes

Proper Break-In Procedure for Steel or Cast Iron Rotors

New steel/iron rotors should be bedded in before being used in racing conditions. Proper bedding will prepare the rotor surface, prolong the rotor's life, and make it more resistant to thermal checking or cracking under severe braking conditions. The following procedures should be performed when bedding in both steel and cast iron rotors. It is best to bed in a new rotor using a used set of pads, preferably ones which will not create heat rapidly. Generating heat too rapidly will thermal shock the rotors. Likewise, when bedding in a new set of brake pads it is best to perform the process on a used rotor. This new/used bedding process permits controlled bedding of each individual component.

Make sure rotor surfaces are free from oils, grease, and brake fluid. Run vehicle up to a moderate speed and make several medium deceleration stops to heat up the rotor slowly. This will help reduce the chance of thermal shock caused by uneven heating of the rotor. Pull into the pits and allow the rotor to cool to ambient air temperature. Care should be taken not to ride the brakes into the pits as this may hot spot the rotor causing premature wear to the surface or structural damage.