Bottom Mount Adjustable Knob Proportioning Valve Kit, Fits Mopar Masters 2225621

Mopar Bottom Mount Adjustable Proportioning Valve Kit – For 2225621 & MC571 4-Bolt Master Cylinders

Part #: 260-11179-MBM

Clean, bolt-on brake balance for your Mopar.

Adding a power brake booster or converting to disc brakes? Your Mopar needs a proportioning valve that fits properly and lets you fine-tune front-to-rear brake balance. This complete bottom mount kit tucks an adjustable knob-style proportioning valve, similar to the Wilwood 260-11179, right underneath the popular 4-bolt Mopar Bendix-style master cylinders, 2225621 and MC571. It comes with pre-bent lines, fittings and a powder coated bracket, so there are no extra parts to track down.

Bottom mount design
The black powder coated bracket mounts the valve directly under the master cylinder. That keeps the install compact and tidy, with no hunting for a spot on the inner fender or frame rail.

Pre-bent lines, ready to install
Two steel pre-bent lines with fittings are shaped specifically for 4-bolt Mopar master cylinders. They connect the master cylinder to the valve with no bending, cutting or flaring.

Adjustable brake balance
The knob-style adjustable valve lets you dial in rear brake pressure to suit your setup. It helps prevent early rear lockup and gives a balanced, confident stop.

Disc/drum or disc/disc
The kit works on a wide range of Mopar cars and trucks running either disc/drum or 4-wheel disc brakes. It’s the perfect complement to a power brake booster upgrade or a disc brake conversion.

Brake lights stay simple
The valve has a built-in brake light switch, and the electrical pigtail is included for easy wiring.

What’s included

• Adjustable knob-style proportioning valve (similar to Wilwood 260-11179)
• Black powder coated bottom mount bracket
• (2) Steel pre-bent lines & fittings, designed to fit 4-bolt Mopar master cylinders only
• (5) Steel 3/8"-24 fittings
• Brake light electrical pigtail

Fits

• Mopar 4-bolt Bendix-style master cylinders 2225621 and MC571
• Disc/drum and disc/disc brake systems
• A wide range of Mopar cars and trucks

⚠ What this kit is not
This kit is not made to fit Wilwood, Ford or GM master cylinders of any kind, and it will not work with them. It’s designed only for 4-bolt Mopar master cylinders (2225621 and MC571).

Please note: The master cylinder in the photos is not included. It’s shown for reference only.

The heading and opening paragraph say “Mopar cars and trucks,” since this kit only fits Mopar master cylinders. Your original text said “a wide range of cars and trucks,” and “Mopar” stops non-Mopar shoppers from assuming it fits their vehicle. Change it back if you’d rather keep it broader.