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Please, add your first item to the wishlist

Select vehicle to confirm fitment

Brake Master Cylinder

PART#: 18M198
ACDelco

$49.95

In stock

Fitments
YearMakeModelSubmodelEngineFuel TypePositionNote
1988ChevroletMonte CarloBase5.0V8GAS
1988ChevroletMonte CarloLS5.0V8GAS
1988ChevroletMonte CarloLS4.3V6GAS
1988ChevroletMonte CarloBase4.3V6GAS
1988ChevroletMonte CarloSS5.0V8GAS
1988OldsmobileCutlass SupremeIndy 500 Pace Car2.8V6GAS | RWD;
1988OldsmobileCutlass SupremeBase2.8V6GAS | RWD;
1988OldsmobileCutlass SupremeInternational2.8V6GAS | RWD;
1988OldsmobileCutlass SupremeSL2.8V6GAS | RWD;
1988OldsmobileCutlass SupremeClassic5.0V8GAS | RWD;
1988OldsmobileCutlass SupremeClassic Brougham5.0V8GAS | RWD;
1987BuickRegalLimited5.0V8GAS
1987BuickRegalBase5.0V8GAS
1987BuickRegalLimited3.8V6GAS
1987BuickRegalGNX3.8V6GAS
1987BuickRegalBase3.8V6GAS
1987BuickRegalGrand National3.8V6GAS
1987ChevroletEl CaminoSS5.0V8GAS
1987ChevroletEl CaminoSS4.3V6GAS
1987ChevroletEl CaminoBase5.0V8GAS
1987ChevroletEl CaminoBase4.3V6GAS
1987ChevroletMonte CarloBase5.0V8GAS
1987ChevroletMonte CarloBase4.3V6GAS
1987ChevroletMonte CarloSS5.0V8GAS
1987ChevroletMonte CarloLS5.0V8GAS
1987ChevroletMonte CarloLS4.3V6GAS
1987GMCCaballeroBase5.0V8GAS
1987GMCCaballeroBase4.3V6GAS
1987GMCCaballeroDiablo5.0V8GAS
1987GMCCaballeroDiablo4.3V6GAS
1987OldsmobileCutlass SalonBase5.0V8GAS
1987OldsmobileCutlass SalonBase3.8V6GAS
1987OldsmobileCutlass SupremeBrougham3.8V6GAS
1987OldsmobileCutlass SupremeBase5.0V8GAS
1987OldsmobileCutlass Supreme4423.8V6GAS
1987OldsmobileCutlass SupremeBrougham5.0V8GAS
1987OldsmobileCutlass SupremeBase3.8V6GAS
1987OldsmobileCutlass Supreme4425.0V8GAS
1987PontiacGrand PrixLE3.8V6GAS
1987PontiacGrand PrixBrougham5.0V8GAS
1987PontiacGrand PrixBrougham4.3V6GAS
1987PontiacGrand PrixBrougham3.8V6GAS
1987PontiacGrand PrixBase5.0V8GAS
1987PontiacGrand PrixBase4.3V6GAS
1987PontiacGrand PrixLE5.0V8GAS
1987PontiacGrand PrixLE4.3V6GAS
1987PontiacGrand PrixBase3.8V6GAS
1986BuickRegalBase3.8V6GAS
1986BuickRegalGrand National3.8V6GAS
1986BuickRegalLimited3.8V6GAS
1986BuickRegalT-Type3.8V6GAS
1986BuickRegalBase5.0V8GAS
1986BuickRegalLimited5.0V8GAS
1986ChevroletEl CaminoBase5.0V8GAS
1986ChevroletEl CaminoSS5.0V8GAS
1986ChevroletEl CaminoBase4.3V6GAS
1986ChevroletEl CaminoConquista5.0V8GAS
1986ChevroletEl CaminoConquista4.3V6GAS
1986ChevroletEl CaminoSS4.3V6GAS
1986ChevroletMonte CarloBase5.0V8GAS
1986ChevroletMonte CarloLS5.0V8GAS
1986ChevroletMonte CarloBase4.3V6GAS
1986ChevroletMonte CarloLS4.3V6GAS
1986ChevroletMonte CarloSS5.0V8GAS
1986GMCCaballeroBase5.0V8GAS
1986GMCCaballeroBase4.3V6GAS
1986GMCCaballeroDiablo5.0V8GAS
1986GMCCaballeroAmarillo5.0V8GAS
1986GMCCaballeroDiablo4.3V6GAS
1986GMCCaballeroAmarillo4.3V6GAS
1986OldsmobileCutlass Salon4425.0V8GAS
1986OldsmobileCutlass SalonBase5.0V8GAS
1986OldsmobileCutlass SalonBase3.8V6GAS
1986OldsmobileCutlass SupremeBase5.0V8GAS
1986OldsmobileCutlass SupremeBase3.8V6GAS
1986OldsmobileCutlass SupremeBrougham5.0V8GAS
1986OldsmobileCutlass SupremeBrougham3.8V6GAS
1986PontiacBonnevilleBase5.0V8GAS
1986PontiacBonnevilleBase4.3V6GAS
1986PontiacBonnevilleBase3.8V6GAS
1986PontiacBonnevilleLE5.0V8GAS
1986PontiacBonnevilleLE4.3V6GAS
1986PontiacBonnevilleBrougham3.8V6GAS
1986PontiacBonnevilleLE3.8V6GAS
1986PontiacBonnevilleBrougham5.0V8GAS
1986PontiacBonnevilleBrougham4.3V6GAS
1986PontiacGrand PrixBrougham5.0V8GAS
1986PontiacGrand PrixBrougham4.3V6GAS
1986PontiacGrand PrixBrougham3.8V6GAS
1986PontiacGrand PrixLE5.0V8GAS
1986PontiacGrand PrixLE4.3V6GAS
1986PontiacGrand PrixBase3.8V6GAS
1986PontiacGrand PrixBase5.0V8GAS
1986PontiacGrand PrixBase4.3V6GAS
1986PontiacGrand PrixLE3.8V6GAS
1985BuickRegalBase3.8V6GAS
1985BuickRegalLimited3.8V6GAS
1985BuickRegalT-Type3.8V6GAS
1985BuickRegalGrand National3.8V6GAS
1985BuickRivieraBase5.0V8GAS
1985BuickRivieraLuxury5.0V8GAS
1985ChevroletEl CaminoBase4.3V6GAS
1985ChevroletEl CaminoConquista5.0V8GAS
1985ChevroletEl CaminoSS5.0V8GAS
1985ChevroletEl CaminoBase5.0V8GAS
1985ChevroletEl CaminoSS4.3V6GAS
1985ChevroletEl CaminoConquista4.3V6GAS
1985ChevroletMonte CarloSS5.0V8GAS
1985ChevroletMonte CarloBase5.0V8GAS
1985ChevroletMonte CarloBase4.3V6GAS
1985GMCCaballeroDiablo5.0V8GAS
1985GMCCaballeroDiablo4.3V6GAS
1985GMCCaballeroBase4.3V6GAS
1985GMCCaballeroBase5.0V8GAS
1985GMCCaballeroAmarillo5.0V8GAS
1985GMCCaballeroAmarillo4.3V6GAS
1985OldsmobileCutlass SupremeBase5.0V8GAS
1985OldsmobileCutlass SupremeLS3.8V6GAS
1985OldsmobileCutlass SupremeBrougham3.8V6GAS
1985OldsmobileCutlass SupremeBase3.8V6GAS
1985OldsmobileCutlass SupremeLS5.0V8GAS
1985OldsmobileCutlass SupremeBrougham5.0V8GAS
1985PontiacBonnevilleLE5.0V8GAS
1985PontiacBonnevilleBrougham5.0V8GAS
1985PontiacBonnevilleBrougham3.8V6GAS
1985PontiacBonnevilleBase5.0V8GAS
1985PontiacBonnevilleLE3.8V6GAS
1985PontiacBonnevilleBase3.8V6GAS
1985PontiacGrand PrixBase3.8V6GAS
1985PontiacGrand PrixBrougham3.8V6GAS
1985PontiacGrand PrixLE3.8V6GAS
1985PontiacGrand PrixBrougham5.0V8GAS
1985PontiacGrand PrixBase5.0V8GAS
1985PontiacGrand PrixLE5.0V8GAS
1984BuickRegalLimited4.1V6GAS
1984BuickRegalT-Type3.8V6GAS
1984BuickRegalLimited3.8V6GAS
1984BuickRegalBase4.1V6GAS
1984BuickRegalBase3.8V6GAS
1984BuickRegalGrand National3.8V6GAS
1984BuickRivieraLuxury5.7V8DIESELwith Vacuum Booster
1984BuickRivieraBase5.7V8DIESELwith Vacuum Booster
1984BuickRivieraLuxury5.0V8GAS
1984BuickRivieraBase4.1V6GAS
1984BuickRivieraBase5.0V8GAS
1984BuickRivieraLuxury4.1V6GAS
1984ChevroletEl CaminoSS5.0V8GAS
1984ChevroletEl CaminoConquista3.8V6GAS
1984ChevroletEl CaminoConquista5.0V8GAS
1984ChevroletEl CaminoBase5.0V8GAS
1984ChevroletEl CaminoSS3.8V6GAS
1984ChevroletEl CaminoBase3.8V6GAS
1984ChevroletEl CaminoSS3.8V6GAS
1984ChevroletEl CaminoBase3.8V6GAS
1984ChevroletEl CaminoConquista3.8V6GAS
1984ChevroletMonte CarloBase3.8V6GAS
1984ChevroletMonte CarloBase3.8V6GAS
1984ChevroletMonte CarloBase5.0V8GAS
1984ChevroletMonte CarloSS5.0V8GAS
1984GMCCaballeroAmarillo5.0V8GAS
1984GMCCaballeroBase3.8V6GAS
1984GMCCaballeroAmarillo3.8V6GAS
1984GMCCaballeroDiablo5.0V8GAS
1984GMCCaballeroBase3.8V6GAS
1984GMCCaballeroDiablo3.8V6GAS
1984GMCCaballeroBase5.0V8GAS
1984GMCCaballeroDiablo3.8V6GAS
1984OldsmobileCutlass CalaisBase5.0V8GAS
1984OldsmobileCutlass CalaisHurst5.0V8GAS
1984OldsmobileCutlass CalaisBase3.8V6GAS
1984OldsmobileCutlass SupremeBrougham3.8V6GAS
1984OldsmobileCutlass SupremeBase5.0V8GAS
1984OldsmobileCutlass SupremeBase3.8V6GAS
1984OldsmobileCutlass SupremeBrougham5.0V8GAS
1984PontiacBonnevilleBase5.0V8GAS
1984PontiacBonnevilleLE3.8V6GAS
1984PontiacBonnevilleBrougham5.0V8GAS
1984PontiacBonnevilleBrougham3.8V6GAS
1984PontiacBonnevilleLE5.0V8GAS
1984PontiacBonnevilleBase3.8V6GAS
1984PontiacGrand PrixBrougham5.0V8GAS
1984PontiacGrand PrixLE5.0V8GAS
1984PontiacGrand PrixBase5.0V8GAS
1984PontiacGrand PrixLE3.8V6GAS
1984PontiacGrand PrixBase3.8V6GAS
1984PontiacGrand PrixBrougham3.8V6GAS
1983BuickRegalLimited3.8V6GASExcept Vehicles Built For United States Market
1983BuickRegalEstate Wagon5.7V8DIESELExcept Vehicles Built For United States Market
1983BuickRegalLimited4.1V6GASExcept Vehicles Built For United States Market
1983BuickRegalT-Type3.8V6GASExcept Vehicles Built For United States Market
1983BuickRegalBase4.3V6DIESELExcept Vehicles Built For United States Market
1983BuickRegalEstate Wagon3.8V6GASExcept Vehicles Built For United States Market
1983BuickRegalLimited5.7V8DIESELExcept Vehicles Built For United States Market
1983BuickRegalLimited4.3V6DIESELExcept Vehicles Built For United States Market
1983BuickRegalBase3.8V6GASExcept Vehicles Built For United States Market
1983BuickRegalEstate Wagon4.1V6GASExcept Vehicles Built For United States Market
1983BuickRegalBase5.7V8DIESELExcept Vehicles Built For United States Market
1983BuickRegalBase4.1V6GASExcept Vehicles Built For United States Market
1983BuickRivieraBase5.7V8DIESELVehicles Built For United States Market | Rear Brake Type: Drum;
1983BuickRivieraXX Anniversary Edition4.1V6GASVehicles Built For United States Market | Rear Brake Type: Drum;
1983BuickRivieraBase4.1V6GASVehicles Built For United States Market | Rear Brake Type: Drum;
1983BuickRivieraXX Anniversary Edition5.7V8DIESELVehicles Built For United States Market | Rear Brake Type: Drum;
1983BuickRivieraLuxury5.7V8DIESELVehicles Built For United States Market | Rear Brake Type: Drum;
1983BuickRivieraLuxury4.1V6GASVehicles Built For United States Market | Rear Brake Type: Drum;
1983BuickRivieraBase5.0V8GASVehicles Built For United States Market | Rear Brake Type: Drum;
1983BuickRivieraLuxury5.0V8GASVehicles Built For United States Market | Rear Brake Type: Drum;
1983BuickRivieraXX Anniversary Edition5.0V8GASVehicles Built For United States Market | Rear Brake Type: Drum;
1983BuickRivieraT-Type3.8V6GASVehicles Built For United States Market | Rear Brake Type: Drum;
1983ChevroletEl CaminoBase3.8V6GAS
1983ChevroletEl CaminoSS3.8V6GAS
1983ChevroletEl CaminoBase3.8V6GAS
1983ChevroletEl CaminoBase5.0V8GAS
1983ChevroletEl CaminoConquista5.0V8GAS
1983ChevroletEl CaminoConquista3.8V6GAS
1983ChevroletEl CaminoSS3.8V6GAS
1983ChevroletEl CaminoConquista3.8V6GAS
1983ChevroletEl CaminoSS5.0V8GAS
1983ChevroletMonte CarloSS5.0V8GAS
1983ChevroletMonte CarloBase3.8V6GAS
1983ChevroletMonte CarloCL3.8V6GAS
1983ChevroletMonte CarloBase5.0V8GAS
1983ChevroletMonte CarloBase3.8V6GAS
1983ChevroletMonte CarloCL3.8V6GAS
1983ChevroletMonte CarloCL5.0V8GAS
1983GMCCaballeroAmarillo3.8V6GAS
1983GMCCaballeroBase5.0V8GAS
1983GMCCaballeroAmarillo5.0V8GAS
1983GMCCaballeroAmarillo3.8V6GAS
1983GMCCaballeroBase3.8V6GAS
1983GMCCaballeroDiablo5.0V8GAS
1983GMCCaballeroDiablo3.8V6GAS
1983GMCCaballeroBase3.8V6GAS
1983GMCCaballeroDiablo3.8V6GAS
1983OldsmobileCutlass CalaisHurst5.0V8GAS
1983OldsmobileCutlass CalaisBase5.0V8GAS
1983OldsmobileCutlass CalaisHurst3.8V6GAS
1983OldsmobileCutlass CalaisBase3.8V6GAS
1983OldsmobileCutlass SupremeBase5.0V8GAS
1983OldsmobileCutlass SupremeBrougham5.0V8GAS
1983OldsmobileCutlass SupremeBrougham3.8V6GAS
1983PontiacBonnevilleBrougham5.0V8GAS
1983PontiacBonnevilleBase5.0V8GAS
1983PontiacBonnevilleBase3.8V6GAS
1983PontiacBonnevilleBrougham3.8V6GAS
1983PontiacGrand PrixBrougham3.8V6GAS
1983PontiacGrand PrixLJ3.8V6GAS
1983PontiacGrand PrixBase5.0V8GAS
1983PontiacGrand PrixBase3.8V6GAS
1983PontiacGrand PrixLJ5.0V8GAS
1983PontiacGrand PrixBrougham5.0V8GAS
Product info

The ACDelco Brake Master Cylinder part number 18M198 is an essential component for ensuring optimal braking performance in Buick, Chevrolet, GMC, and Oldsmobile vehicles. This high-quality replacement part is designed to meet or exceed OEM specifications and offers a range of benefits and features that make it an excellent choice for car owners.

One of the key benefits of the ACDelco Brake Master Cylinder is its durable construction. Made from high-quality materials, this component is built to withstand the rigors of daily use and provide reliable performance over the long term. Its rugged design also ensures that it can handle the high-pressure demands of modern braking systems.

In addition to its durability, the ACDelco Brake Master Cylinder also offers exceptional precision and control. Its advanced design allows for precise modulation of braking pressure, which helps to improve overall stopping performance and reduce the risk of skidding or loss of control. This level of control is especially important in emergency situations, where every second counts.

Finally, the ACDelco Brake Master Cylinder is incredibly easy to install, making it a great choice for DIYers and professional mechanics alike. With its straightforward design and clear instructions, this component can be installed quickly and easily, without the need for specialized tools or equipment.

Overall, the ACDelco Brake Master Cylinder part number 18M198 is an excellent choice for anyone looking to improve the performance and reliability of their vehicle’s braking system. Whether you’re a professional mechanic or a DIYer, this component offers the durability, precision, and ease of installation you need to get the job done right.

About ACDelco

When it comes to top-notch auto parts, one brand that stands tall is ACDelco. Popular for its commitment to quality and innovation, ACDelco has been a trusted name in the automotive industry. At Newparts.com, we're proud to offer a wide selection of ACDelco auto parts, including ACDelco spark plugs, ACDelco alternators, and ACDelco air filters, and other ACDelco parts, all at discounted prices.

ACDelco spark plugs are engineered to deliver exceptional performance and reliability, ensuring optimal engine operation and fuel efficiency. Whether you're cruising down the highway or navigating city streets, you can trust ACDelco spark plugs to keep your engine firing on all cylinders.

When it comes to power generation, ACDelco alternators are second to none. Designed to withstand the challenges of daily driving, ACDelco alternators deliver consistent power output to keep your vehicle's electrical systems running smoothly. With ACDelco alternators from Newparts.com, you can count on reliable performance mile after mile.

In addition to spark plugs and alternators, we also offer a range of ACDelco air filters to help keep your engine breathing clean, fresh air. ACDelco air filters are designed to trap dirt, dust, and other contaminants, preventing them from entering your engine and causing damage. With a high-quality ACDelco air filter from Newparts.com, you can enjoy improved engine performance and extended engine life.

At Newparts.com, we understand that getting the right parts quickly is essential. That's why we offer fast shipping on all ACDelco auto parts, so you can get back on the road with confidence. Plus, with our discounted prices, you can save big on the parts you need to keep your vehicle running smoothly. In case you want to purchase parts by phone, feel free to call us at 855-505-2886 and our customer service team will help you out. 

Whether you're in need of spark plugs, alternators, air filters, or any other ACDelco auto parts, Newparts.com has you covered. Shop our selection today and experience the quality and reliability of ACDelco for yourself.

Specifications
New
Bleeder Hoses IncludedYes
Brake Booster IncludedNo
Master Cylinder Bore Diameter0.9448818898
Master Cylinder Cap IncludedYes
Master Cylinder MaterialAluminum
Mounting Bracket IncludedNo
Mounting Hole Quantity2
Port Quantity2
Primary Outlet Thread Diameter0.5625
Pushrod IncludedNo
Reservoir IncludedYes
Secondary Outlet Thread Diameter0.5
Warranty
We offer a 2-year warranty on all parts that we sell. If the part fails within 2 years of purchase, please contact us for instructions to replace it. The warranty does not cover normal wear and tear or improper installation. On many parts, we also offer Extend product protection, which is a way to add up to 3 additional years for 5 total years of worry free coverage. Select your preferred term length and you're covered!
Delivery & Returns

Delivery Info

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Returns Info

Newparts.com offers a thirty (30) day return for refund for all items purchased through Newparts.com. To qualify for return and refund, all items must be new and in their original manufacturers box. To initiate a return, please contact our customer service. This information is only a summary. Complete shipping and return policy information can be found in our web site policies.

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