Wilwood Brake Proportioning Valves 260-11179

It is a basic adjustable proportioning valve. I used it on a Chevy truck, in place of the stock ABS proportioning valve with front and rear disks. You can turn the pressure up or down to the rear as best suited for your vehicle. I don't think you should need a 2 lb reducing valve with this, but if you you installed a 2 lb valve to keep pressure to the back for a better pedal, you should keep that in.

NICK from IL answered on January 16, 2017

i install on 1980 malibu with strange rear disc brakes and stock front disc front and needed no extra valve to make work properly. great product.

DONALD L from NC answered on January 16, 2017

this product is for front and rear brakes, disk or drum it doesn't matter. It proportions the pressure from front to rear so your rear brakes don't lock up before your front ones can stop you. I'm using this proportioning valve in a custom brake setup, where most OEM ones are preset and can't be changed, so when you add rear disks to a drum car you need to send a different amount of pressure to the rear brakes,the adjustable valve allows you to dial in the pressure more or less pressure is dependent on the vehicle. as far as a 2 lb pressure reducing valve i'm thinking you mean a pressure residual valve, that's a valve that holds a little pressure in the lines after the pedal is released this is not built in, (that should only be needed if you've installed the master cylinder below the height of the brake cylinders and not on your firewall)

DWAYNE from MN answered on January 16, 2017

Is for disc and valves are built in.

MARK from WA answered on January 16, 2017

No such thing as a 2 lb reducing valve. It is a 2 lb residual valve. They are used to maintain constant pressure on the brake system. For an under-the-floor master cylinder brake system, a 2 lb. residual valve is used for disc brakes to keep brake fluid from flowing back down into the master cylinder. So, you would only need it if your master cylinder is under the floor.

THOMAS from TN answered on January 18, 2017

After purchasing this product in kit form with the MC, I can answer this question correctly per Wilwood's install directions:
"a fluid port with a pressure switch responds instantly to pressure in front fluid circuit for brake light activation". "....if you wish to eliminate the switch on the brake pedal, use the switch in the proportioning valve block". I can only translate this as the switch DOES activate the brake lights.

HENRY from NC answered on November 07, 2018

No it does not, this is to turn on the brake warning light on the dash. brake pressure imbalance from loss of fluid like a leak etc.. you still use the switch on the brake pedal for brake lights

WILLIAM from TX answered on October 27, 2018

I use this switch for my brake lights as my Mercury didn't come with a brake light switch on the linkage. It is not a brake balance switch typically seen on combo valve.

WILLIAM from CA answered on January 20, 2019

I am converting a 68 firebird std drum car to willwood discs 12.19" F & R , and 15/16" master willwood kit with the valve , eliminating the factory metering block . Try PN Doorman RWB-785-434 , and PN CLB-45045 at Summit for the adapter plugs commonly needed for GM brake lines though the 70s.

DANIEL from CA answered on May 04, 2020

You need a 3/8x24 male to 7/16x20 female fitting. I got mine at a local race shop.

DARIN from FL answered on July 24, 2018

I had to fabricate a bracket from a 90 degree piece of metal with two holes. One hole bolted to master cylinder, the other to the P- valve.

SCOTT from GA answered on July 23, 2018

Combination Proportioning Valve Bracket Kit
Part Number 220-13189 (Left Hand) or 220-15047 (Right Hand)

TONY from New Zealand answered on January 15, 2019