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Universal Power/Manual Master Cylinder, 1 Inch Bore
Universal Power/Manual Master Cylinder, 1 Inch Bore


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Universal Power/Manual Master Cylinder, 1 Inch Bore
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Part # UP100839
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  • This product is discontinued.
  • This item ships directly from the manufacturer. It may take an additional business days for Speedway Motors to ship this item.
  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
  • This item ships via Ground Shipping only. Expedited and Air shipping options are not available.
  • This item UP100839 is made to order. It will be shipped from our warehouse when it is produced.



This is garage sale priced because it has a casting flaw and does not include plugs.

No Warranty, No Returns on Garage Sale Items    


These high-tech corvette-style master cylinders were designed using OE specifications and 100% tested.  They have a 1" bore and are suited for disc/drum combinations. Each master cylinder is ported on both the left and right sides, allowing for installation in many different applications. This exclusive design features a mating flange that works with applications requiring 3-1/8” through 3-3/8” bolt patterns.  These master cylinders will work with manual or power brake systems and can be quickly changed with the included adapter pin to plug the deep well.  The wide body and low profile gives this master cylinder the clearance you need when installing in tight areas and yet it maintains a large volume of fluid necessary for 2 and 4 wheel disc brake applications.

  • 1" bore
  • 3/8"-24 IFF outlet ports on both sides
  • Plugs are included for the unused ports
  • Mount spacing is 3-3/8" on center
  • Works with power or manual brake systems
  • Compact, for installation under floor or on firewall
  • Suited for either disc/disc or disc/drum combinations 
  • Stroke of this master cylinder is approximatlely 1-1/16"
  • Has a piston adaptor that will allow for power or manual applications


Brake System Builders Tip (Link)

Some parts are not legal for use in California or other states with similar laws/regulations

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