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JEGS Universal Master Cylinder 1-1/8" Bore


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Universal Master Cylinder 1-1/8" Bore
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Universal Master Cylinder
  • 1-1/8" Bore
  • Aluminum body
  • Composite Dual Reservoir
  • Holes Provided for Fabricating Side Mount
  • 1/2"-20 Ports
  • (2) 1/2"-20 IFM to 3/8"-24 IFF Fittings
  • (1) Boot
  • (1) 3/8"-24 Rod
  • Ships

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    631406 is rated 4.7 out of 5 by 7.
    Rated 5 out of 5 by from Great product !!!!!!! This Is the second of these I’ve purchased and have been very pleased with them.
    Date published: 2020-02-29
    Rated 5 out of 5 by from Love the side mounting. I've been running this master on my 50 Pontiac as a daily driver for the past 5 years. Still going strong so I decided to upgrade the 49 as well. Installs in many configurations and is much safe than a single piston master.
    Date published: 2019-03-05
    Rated 5 out of 5 by from Light weight and clean Great kit. Very light and cleans up engine bay nicely
    Date published: 2015-11-21
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    • clientName_jegs

    Thanks for the advice. I ordered your rear disc conversion and it arrived a few days ago. Will my old linelock system work without interfering with the master cylinder, or would you advise to get a more modern one, or not to use one at all.

    Asked by: Phil H
    The standard line lock kit will sell is made for the front brakes and will not be affected by the rear disc kit.
    Answered by: Rusty B
    Date published: 2018-06-15

    Have a 1967 Mustang I'm converting to disc brakes. Maybe 4 wheel-not sure. B4 once the drums got a little glazed at126 mph thru the traps meant funny car turnaround. Will this work for 2/4wheel conversion and make a better stop w/out Gorilla leg?

    Asked by: Phil H
    This will provide more braking power than your original brakes and should be used in a disc/disc setup.
    Answered by: Rusty B
    Date published: 2020-12-09

    Does rod pivot where it engages the master cylinder, or is it screwed in solid to the master cylinder? I need a rod that pivots for a 63 Lemans. And, can I get the rod in a longer length (say 6")? I can extend the rod, but I need the pivot.

    Asked by: Thud
    This rod will pivot in the master cylinder. We do not have this with a long pushrod.
    Answered by: Rusty B
    Date published: 2020-12-09

    Does master cylinder 555-631406 require a booster and what type of racing pedal will fit it?

    Asked by: stephen15
    These do not require a booster, they are designed for manul race car brake system. Most pedals can be connected to this master cylinder.
    Answered by: Rusty B
    Date published: 2018-06-15

    I have a 83 Monte ss that needs just master cylinder and rod that this universal kit comes with can i use this kit for it? It's is a drag car I'm not using a brake booster just master and push rod is all I need can use this universal kit?

    Asked by: Monte83ss
    It is universal, so as long as it fits your application than it should work for your application.
    Answered by: Rusty B
    Date published: 2018-06-15
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