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View All JEGS Master Cylinders & Power Brake Boosters

JEGS Brake Master Cylinder, Aluminum with Chrome Finish [GM Universal Mounting]

555-631006

JEGS

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Brake Master Cylinder, Aluminum with Chrome Finish [GM Universal Mounting]
$175.99
Brake Master Cylinder
  • GM Universal Mounting
  • Non-Power Assisted Disc/Drum Applications
  • Power Assisted Drum/Drum, Disc/Drum & Disc/Disc Applications
  • 1 1/8 in. Bore
  • 9/16 in.-18 & 1/2 in.-20 Port on Ea. Side
  • Aluminum
  • Chrome Finish
    • Free Shipping - Ships on 09/13/22

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    JEGS 631394 - Brake Master Cylinder with Dual Reservoir, Aluminum with Chrome Finish [GM Universal Mounting]
    Part Number: 555-631394
    $144.99

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    631006 is rated 4.4 out of 5 by 5.
    Rated 5 out of 5 by from JEGS Master Cylinder This is a great looking master cylinder and is lighter than the stock cast iron units. I also like that it has the option to run the brake lines on the opposite side. I bought this unit after having not much success with rebuilt cast iron units that kept leaking. Also this one was on the lower cost side of other aluminum ones I researched. The two Allen screws to retain the top give it a nice clean look and are an improvement over the bail type retainers. I had a little trouble with getting the front brake line to stop leaking but I am using silicone brake fluid which may add to the difficulty. I used some high temp thread sealer on the outside threads to resolve.
    Date published: 2015-02-14
    Rated 4 out of 5 by from Looks nice after.... What is it with the brake line fittings AND the given plugs not wanting to seal? Felt like the amount of required torque is too high.never got the original 1/2 20 front fitting adapter to seal,had to replace line with new 1/2 20 fitting for 3/16 line. Sealed right up,first time. A lot of grief but it looks nice now that it is done.
    Date published: 2017-03-04
    Rated 4 out of 5 by from Booster I would like to have better finishing on the cap the chrome is a little wavy. The booster has line ports on both sides which makes it universal but the plugs are not finished which takes away from the appearance.
    Date published: 2015-11-10
    Rated 4 out of 5 by from Looks nice, works well Looks great in the car and I like that you have to take the top off to add brake fluid, keeps it rom scraping the chrome like the old flip style ones. Easy to install, great for different applications
    Date published: 2015-06-18
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    Is there a gasket for the cover? Mine seems to leak

    Asked by: Mikey52
    Yes, there is a rubber diaphragm gasket in the top of the cover.
    Answered by: Rusty B
    Date published: 2017-10-20
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