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Receive Up To 35% Off Your Online Purchase Of Select Parts And Accessories
Use promotional code MMJ35 at checkout to receive 35% off the following categories: Select Brake Parts, Select Hi-Performance and Truck Accessories, Batteries, Paint, Splash Guards, Select Ventvisors & Bug Shields, Springs & Spacers, Water Pumps, Belts, A/C Parts, Starters, Alternators, Fuel Pumps, Radiators, Radiator Fans, Thermostats, Caps & Clamps, Clutches, Spark Plugs, Plug Wires, CV Axles, Battery Chargers & Booster Cables, OE Locks, Rack & Pinons, Window Motors, RainX Wipers, Appearance Chemicals, Floor Mats, Lift Equipment, Hand Tools, Travel Accessories, Car Covers, Seat Covers, Wheel Covers, Body Repair, Collectibles and Apparel.

Use promotional code MMJ20 at checkout to receive 20% off the following categories: Ignition, Shocks & Struts, Chassis, Jumpstarts, Air Filters, Oil Filters, Bearings & Seals, Engine Parts, Wash Accessories, Outdoor Lifestyle, Towing, Mini Air Compressors, Tire Repair Accessories, Mufflers, Grease/Oil, Additive Chemicals, P/S Pumps, Cooling Product, Timing Belts, Specialty Tools, Radiator Hose, Motor Mounts, Mirrors, Lug Nuts, Sealants/Adhesives, Fuel Filters, P/S Hoses, Gas Cans, Oil Change Accessories, Help, Wiper Motors, Loaner Tools, Air Compressors, Horns, Books, Distributors, Sun Control and Exhaust Adapters.

Use promotional code MMJ15 at checkout to receive 15% off the following categories: Test Equipment, Power Tools, Emergency Supplies, Electronics and Stereo & Accessories (MAP pricing Exclusions).

Offers not valid in combination with any other discounts, promotions or items already on sale. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Those products that are included in these offers will be displayed in product search results and product detail pages. Excludes the following brands: WeatherTech, Champion, Powerstop, Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, Thule, Thule Karrite, JVC, Flowmaster, Hurst, B&M, MSD, Moog, Wagner, Philips, Fanmats, K-Source and BBK Performance. Valid online until 11:59 PM EST on 11/26/17.

Receive 10% Off Wagner branded brake parts with your online purchase. Use promotional code: WAGNER10.

Receive 20% Off Select Champion branded products with your online purchase. Use promotional code: CHAMP20.

Receive 10% Off Select FelPro branded products with your online purchase. Use promotional code: FELPRO10.

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ProStop Remanufactured Master Cylinder 8306900
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  • Part #: M1912|
  • SKU: 8306900

5 days after 6 p.m.

    • 100% computer testing ensures guaranteed, consistent performance
    • 100% new OE-quality seals and cups are installed to prevent leakage and ensure like-new performance and reliability. All rubber meets S.A.E. specifications

ProStop Remanufactured Master Cylinder

ProStop Remanufactured Master Cylinders provide reliable performance at the best price. All units are tested before leaving the factory to ensure like-new performance, providing a quality product you and your vehicle can rely on. Bleeding kits are provided for your convenience, allowing you to spend less time in the garage, and more time on the road. Couple this with ProStop's Master Cylinder Bench Bleeder Tool, which cuts typical bleeding procedures in half.
  • 100% computer testing ensures guaranteed, consistent performance
  • 100% new OE-quality seals and cups are installed to prevent leakage and ensure like-new performance and reliability. All rubber meets S.A.E. specifications
  • Bleeding tubes are supplied with applicable applications to make the bleeding process faster and easier
  • Bores meet critical micro-finish specifications to eliminate pitting and corrosion, which could cause premature failure
  • Cast iron master cylinders come with premium protective coating to minimize rust, extending on-car and on-shelf life
  • Piston assemblies are 100% height-gauged to meet or exceed O.E.M. performance
  • Plastic reservoirs are 100% vacuum-tested to ensure proper function

Reservoir Type
Port Count
Master Cylinder Material
Cast Iron
Master Cylinder Color/Finish
Primary Port Size
1/2 x 20
Mounting Hole Quantity
Reservoir Included
Installation Hardware Included
Bore Diameter (N)
Reservoir Material
1 1/4" x 24mm


ProStop Remanufactured Master Cylinder is rated 4.1 out of 5 by 26.
Rated 5 out of 5 by from SPECIAL ORDER FIT PERFECTLY This was a special order Master Cylinder for a 1977 Lincoln Continental Mark V. It arrived earlier than promised and fit perfectly. Price was the best I could find locally or on the internet.
Date published: 2015-10-26
Rated 5 out of 5 by from It came with bleeder plugs! Well put together, bleeder plugs for bench bleeding were included.
Date published: 2015-10-21
Rated 5 out of 5 by from No surprises Came in on the date it was promised and in good condition.
Date published: 2015-09-07
Rated 4 out of 5 by from Next time Will order one with the attached reservoir next time. My bad, worth the extra money to avoid the hassle of changing it. Way harder than I thought it would be.
Date published: 2015-08-24
Rated 5 out of 5 by from Great part The re-manufactured master cylinder for my moms Sportage was a quality item. Sorry, to say, but the fittings used to bleed out the air were too fragile. They broke as I was putting the supplied plastic hoses on. The wasn't a big deal, as I has some from a previous repair on another vehicle.
Date published: 2015-07-03
Rated 4 out of 5 by from Product was installed and having no problems. Good product, performing well. An A+. Thank you!!
Date published: 2015-06-18
Rated 5 out of 5 by from Installation was a snap The MC has performed as expected since instalation
Date published: 2015-06-16
Rated 5 out of 5 by from master brake cylinder Working great and no problems so far and it saves my time to rebuild my own old cylinder and I decide to replace one piece and it's working like new... thank you!!
Date published: 2015-06-04
Rated 4 out of 5 by from this produdct was great The price was great and it came in a timely matter
Date published: 2015-05-18
Rated 5 out of 5 by from Quick & easy and reasonable ordered the part came in quickly returned my core and this was a simple 30minute job bleed the cylinder fist on the bench the left lines loose and bled each one separately Easy
Date published: 2015-05-02
Rated 1 out of 5 by from Nice item Easy to install works great
Date published: 2015-01-08
Rated 4 out of 5 by from Very good Rem.pump. but it should come with a booster seal. installing a brake cylinder w/o a new booster seal could result in a brake cylinder rear seal rupture. returning the cylinder back for warranty...w/o the cyl. fault.
Date published: 2014-11-19
Rated 3 out of 5 by from good part but bleeder kit did not fit good price and quality but bleeder kit was of no use on this master cylinder and toll free number on the box was disconnected.
Date published: 2013-11-25
Rated 5 out of 5 by from great great price with reservoir
Date published: 2013-10-20
Rated 5 out of 5 by from good & easy easy intallation great price
Date published: 2013-09-22
Rated 5 out of 5 by from Brake Master Cylinder I ordered the master cylinder on-line .The process was easy and appreciated the online discount. I installed it myself,It came with bleeder kit that worked just fine. Now my brakes work good again!
Date published: 2013-09-20
Rated 5 out of 5 by from Great product Easy to install, just like original!
Date published: 2013-08-21
Rated 5 out of 5 by from Worked Nice it came with bench bleed kit. Pretty clear instructions. I was able to fix my leaky master cylinder the first time.
Date published: 2013-08-17
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