Quick Links

MM News

Home  ::  Brakes & Wheels  ::  Brake Master Cylinder Swaps  ::  Manual Brakes  ::  1979-86  ::  21mm 1987-93 5.0L master cyl.

21mm 1987-93 5.0L master cyl.

21mm (1987-93 stock 5.0L power) Master Cylinder Swap, Manual

When you are swapping from the stock 1979-86 5.0L Mustang master cylinder to the 1987-93 5.0L Mustang 21mm power-assisted brake master cylinder while converting to manual brakes, listed below are the parts required, parts we recommend, and items you may also need.

These parts fit
  • 1979-86 Mustang 5.0L
  • 21mm (1987-93 5.0L Mustang power-assisted) master cylinder
  • Manual brake conversion
Required Items
  • Master cylinder
  • Master cylinder installation kit - not available yet
  • Manual brake conversion kit
Recommended Items
  • Adjustable brake proportioning valve
  • Brake fluid
  • Kit to disable the stock proportioning valve
Displaying 1 - 5 of 5 results  
Product ImageProduct(s)Part #
Manual Brake Conversion Kit, 1979-1993 Mustang

Manual Brake Conversion Kit, 1979-1993 Mustang

Kit converts a Fox Mustang to manual brakes
MMBAK-10
$239.97
more info
Manual Brake Pedal Kit, 1979-93

Manual Brake Pedal Kit, 1979-93

Larger Image Manual brake pedal kit with correct mechanical pedal ratio for manual brakes. Includes parts used when converting a Mustang from power brakes to manual brakes except the firewall adapter block. Includes new pedal...
MMBAK-11
$159.97
more info
Brake adapter fittings, 1987-93 master cylinder

Brake adapter fittings, 1987-93 master cylinder

Adapter fittings to connect 1987-93 3-port master cylinder to standard 3/16" diameter brake lines with 3/8-24 inverted-flare tube nuts. This kit fits 1987-93 Mustang 5.0L master cylinder (21mm bore) Any car that has been...
MMBAK-5.2
$28.97
more info
Adjustable Brake Proportioning Valve, SAE ports

Adjustable Brake Proportioning Valve, SAE ports

Wilwood adjustable brake proportioning valve, with SAE threaded ports.
BPV-1
$48.44
more info
Brake Proportioning Valve Plug, 1979-2004

Brake Proportioning Valve Plug, 1979-2004

Plug used to disable the stock brake proportioning valve when an adjustable valve is installed What is this product used for?The stock brake proportioning valve must be removed or disabled whenever an adjustable proportioning...
MM-2450-A
$19.97
more info