KH 4-Piston Swap Without Buying an Expensive Kit

If you’re looking for the cheapest way to convert an early Mustang to front disc brakes, you do not need to buy one of the overpriced conversion kits.

For a factory-style KH 4-piston front disc swap, the parts are still available individually, and the total cost is far less than most of the complete kits on the market.

The best part is that this setup bolts to the original 1965-1973 drum brake spindles, which makes it one of the easiest and most affordable front disc conversions for an early Mustang.

What You Need

For a basic 65–67 KH-style front disc conversion, the core parts are:

Left and right calipers
Left and right caliper brackets
Left and right rotor/hub assemblies
Front brake hoses
Brake pads

Dust shields are optional and not necessary for every build.

Affordable Parts List

Here’s a budget-friendly combination using currently available parts:

Brackets: Auto Pro USA BK1023LR — $62.99 pair
Rotor/Hub Assemblies: Raybestos 6004R — $61.79 each
Pads: Dynamic Friction 1551001101 — $23.99 set
Hoses: Dorman H36062 — $10.53 each
Calipers: can be found as cheap as $70 per pair on eBay, up to around $250 per pair from Mustang parts specialists

Total Cost

Using cheap eBay calipers

Brackets: $62.99
Rotors: $123.58
Pads: $23.99
Hoses: $21.06
Calipers: $70.00

Estimated total: $301.62

Using more expensive Mustang specialist calipers

Brackets: $62.99
Rotors: $123.58
Pads: $23.99
Hoses: $21.06
Calipers: $250.00

Estimated total: $481.62

That means you can do a budget 4-piston caliper Mustang front disc brake swap for around $300 to $480 in core parts, depending mostly on where you buy the calipers.

Why the Kits Cost So Much More

Most of the expensive front disc kits are charging for:

convenience
bundled packaging
fewer sourcing decisions
branding

That’s fine if you want to buy everything in one box.

But if your goal is the most affordable early Mustang front disc conversion, piecing it together yourself is hard to beat.

Important Note

This pricing is for the core front disc conversion parts only.

Depending on your car, you may still need:

bearings and seals
dual reservoir master cylinder
brake line updates
fluid and other service parts

Even with those added, this can still be much cheaper than buying a complete kit.

How to Convert Classic Mustangs to Front Disc Brakes on a Budget