TWS 50/50 Proportioning Block - TR8 TR7

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(10 reviews)
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Direct replacement for the original proportional valve. This has a straight through 50/50 proportioning. With our front brake kit and stock rear brakes this setup work really well. Stop that front end nose dive!


Made out of polished Aluminium.


Also allows you to put a RPC in-line proportioning valve to allow for fine tune adjustment.


  • 5
    Brake proportioning valve.

    Posted by Mark Farver on 21st May 2021

    Fast shipping.

  • 5
    Nice alloy part !

    Posted by Jean-Yves Pellabeuf on 17th Apr 2021

    Installed but not yet tested. Restauration of my TR8 EFI 1980 in progress. Excited to see what it looks like on the road here in France. This summer, probably....................

  • 5
    great quality

    Posted by Eric Rebiere on 26th Sep 2020

    Have not installed it yet but based on the quality of manufacture I am sure it will do the job

  • 5
    Best braking upgrade for the money

    Posted by Richard Truett on 7th Oct 2019

    I use Woody's brake proportioning block on all three of my TRs. The difference is amazing. The rear brakes have plenty of bite and the car stops much more efficiently. Before spending money on changing calipers and rotors, start with this block and then try better pads. You just find that a few small upgrades can save you plenty of money. The block installs easily and fits in place of the stock valve with no modifications necessary. 5 Stars!

  • 5
    Making the Rear Brakes Actually Do Something

    Posted by John Baguley on 18th Jun 2019

    I finally gave up and ordered one; once upon a time the factory prop valve worked pretty well, but overtime the rear brake functionality declined to the point of irrelevance, leaving me with 2-wheel braking. Spirited driving then brought smoking front pads and cold rear drums. One word of caution, you will have to re-learn brake pedal modulation to control your stops. Also, remember that new rear drums are unobtainable, so if you wear them out you are searching forums for alternative systems.

  • 5
    Every TR8 needs one

    Posted by Noah on 23rd Jul 2018

    Had a problem with a customers car after a new master cylinder and stainless lines. A brief phone call is all it took to convince me. It bolts right in place and the results are truly undeniable.

  • 5
    Better Brakes

    Posted by Tony on 31st Oct 2017

    The best 1.5 hour upgrade I could make to my TR. I could tell the difference in the brakes just pulling out of the garage.

  • 5
    I great brake upgrade

    Posted by FastG on 27th Sep 2016

    The valve installed perfectly in the original position. I used a Harbor Freight brake bleeder to suck all the fluid out of the system before I started so I did not even spill a drop of brake fluid. I also loosened the two top hard lines at the master cylinder so I could pivot then out of the way, it gave we a lot more room to work. I put the bottom lines in first, then the top and re-bleed the system. Easy install the the brakes work much better without the crazy nose dive the original setup had.

  • 5

    Posted by Unknown on 1st Sep 2015

    Easy install (bolt on). Looks nice in the engine bay. Simply perfect.