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  2. Auto Parts
  3. Brake System
  4. Brake Hydraulics
  5. Brake Master Cylinder
  6. Dorman M66787

Dorman M66787 Brake Master Cylinder

Dorman M66787 Brake Master Cylinder Image 1
Dorman M66787 Brake Master Cylinder Image 2
Dorman M66787 Brake Master Cylinder Image 3
Dorman M66787 Brake Master Cylinder Image 4
Dorman M66787 Brake Master Cylinder

Dorman
Brand:Dorman
Part Number: M66787
UPC: 00082702401668
Weight: 7.05 lbs
Condition:New



On Sale:

$71.51

Availability:
4 in Stock
Warehouse: US-7
Quantity:

Product Information

Description:

Get the Dorman M66787 Brake Master Cylinder for your vehicle. Buy now and secure your purchase online!

This brake master cylinder is precision-engineered to match the design, function, and performance of the original master cylinder on specific vehicle years, makes and models. It is made of new, high-quality materials for a safe, durable replacement.

Features and Benefits:

  • 100% new - made entirely of new materials, not remanufactured, to ensure highest quality and safety
  • Durable design - all rubber components are made of high-quality EPDM compound for resistance to glycol-based brake fluid
  • Precise replacement - cylinder housing is constructed to match the casting material of the original part and ensure similar performance
  • Strict specifications - made to meet rigorous SAE International standards

Specifications:

Master Cylinder Bore Diameter:
1.125 in.
Master Cylinder Material:
Cast Iron
Mounting Hardware Included:
No
Number of Outlets:
2
Package Contents:
Master Cylinder
Reservoir Included:
Yes
Secondary Outlet Thread Diameter:
0.5 in.
Sensor Included:
No
A1 Cardone #:
10-1331
Aimco #:
M900100
Autospecialty #:
M-86002
Bendix #:
11331
Cardone Select #:
13-1331
Centric Parts #:
130.66002
Centric Parts #:
131.66002
Coni-Seal #:
MC512050
General Motors #:
18008616
General Motors #:
3912128
General Motors #:
3941939
General Motors #:
5458531
General Motors #:
5458905
Lusac #:
66857
MPA #:
NM1331
Raybestos Brake #:
MC36246
Raybestos Brake #:
MC36288
Wagner Brake #:
F66857
Wagner Brake #:
MC66857
Country of Origin:
CN

Select a vehicle to narrow Dorman M66787 Brake Master Cylinder fitment info!

Last Updated: 09/22/2024

Years Vehicle Per Vehicle Fit NotesFitment Notes
Showing 100 fitments from page 2 of 2

1970

 

1969

 

1968

 

1970

 

1969

 

1968

 
GMC G25/G2500 Van

5.0L V8 Gas
1
 
Bore: 1.125 In.
Stamped NF
w/Manual Brakes
w/Moraine Brakes
 

GMC G25/G2500 Van



5.0L V8 Gas Bore: 1.125 In.
Stamped NF
w/Manual Brakes
w/Moraine Brakes

1 Per Vehicle

1970

 

1969

 

1968

 

1970

 

1969

 

1968

 
GMC G25/G2500 Van

5.0L V8 Gas
1
 
Bore: 1.125 In.
w/Bendix Brakes
w/Power Brakes
 

GMC G25/G2500 Van



5.0L V8 Gas Bore: 1.125 In.
w/Bendix Brakes
w/Power Brakes

1 Per Vehicle

1970

 

1969

 

1968

 

1967

 

1970

 

1969

 

1968

 

1967

 
GMC G25/G2500 Van

4.1L L6 Gas OHV
1
 
Bore: 1.125 In.
Stamped NF
w/Manual Brakes
w/Moraine Brakes
 

GMC G25/G2500 Van



4.1L L6 Gas OHV Bore: 1.125 In.
Stamped NF
w/Manual Brakes
w/Moraine Brakes

1 Per Vehicle

1970

 

1969

 

1968

 

1967

 

1970

 

1969

 

1968

 

1967

 
GMC G25/G2500 Van

4.1L L6 Gas OHV
1
 
Bore: 1.125 In.
w/Bendix Brakes
w/Power Brakes
 

GMC G25/G2500 Van



4.1L L6 Gas OHV Bore: 1.125 In.
w/Bendix Brakes
w/Power Brakes

1 Per Vehicle

1969

 

1968

 

1967

 

1969

 

1968

 

1967

 
GMC G25/G2500 Van

3.8L L6 Gas
1
 
Bore: 1.125 In.
Stamped NF
w/Manual Brakes
w/Moraine Brakes
 

GMC G25/G2500 Van



3.8L L6 Gas Bore: 1.125 In.
Stamped NF
w/Manual Brakes
w/Moraine Brakes

1 Per Vehicle

1969

 

1968

 

1967

 

1969

 

1968

 

1967

 
GMC G25/G2500 Van

3.8L L6 Gas
1
 
Bore: 1.125 In.
w/Bendix Brakes
w/Power Brakes
 

GMC G25/G2500 Van



3.8L L6 Gas Bore: 1.125 In.
w/Bendix Brakes
w/Power Brakes

1 Per Vehicle

1967

 

1967

 
GMC G25/G2500 Van

4.6L V8 Gas,
5.4L V8 Gas OHV
1
 
Bore: 1.125 In.
Stamped NF
w/Manual Brakes
w/Moraine Brakes
 

GMC G25/G2500 Van



4.6L V8 Gas,
5.4L V8 Gas OHV Bore: 1.125 In.
Stamped NF
w/Manual Brakes
w/Moraine Brakes

1 Per Vehicle

1967

 

1967

 
GMC G25/G2500 Van

4.6L V8 Gas,
5.4L V8 Gas OHV
1
 
Bore: 1.125 In.
w/Bendix Brakes
w/Power Brakes
 

GMC G25/G2500 Van



4.6L V8 Gas,
5.4L V8 Gas OHV Bore: 1.125 In.
w/Bendix Brakes
w/Power Brakes

1 Per Vehicle

1970

 

1970

 
GMC K25/K2500 Pickup

6.6L V8 Gas OHV
1
 
Bore: 1.125 In.
 

GMC K25/K2500 Pickup



6.6L V8 Gas OHV Bore: 1.125 In.

1 Per Vehicle

1970

 

1969

 

1970

 

1969

 
GMC K25/K2500 Pickup

5.7L V8 Gas OHV,
5.7L V8 LPG OHV
1
 
Bore: 1.125 In.
 

GMC K25/K2500 Pickup



5.7L V8 Gas OHV,
5.7L V8 LPG OHV Bore: 1.125 In.

1 Per Vehicle

1970

 

1969

 

1968

 

1970

 

1969

 

1968

 
GMC K25/K2500 Pickup

5.0L V8 Gas OHV
1
 
Bore: 1.125 In.
 

GMC K25/K2500 Pickup



5.0L V8 Gas OHV Bore: 1.125 In.

1 Per Vehicle

1970

 

1969

 

1968

 

1967

 

1970

 

1969

 

1968

 

1967

 
GMC K25/K2500 Pickup

4.1L L6 Gas OHV,
4.8L L6 Gas OHV
1
 
Bore: 1.125 In.
 

GMC K25/K2500 Pickup



4.1L L6 Gas OHV,
4.8L L6 Gas OHV Bore: 1.125 In.

1 Per Vehicle

1969

 

1968

 

1969

 

1968

 
GMC K25/K2500 Pickup

6.5L V8 Gas OHV
1
 
Bore: 1.125 In.
 

GMC K25/K2500 Pickup



6.5L V8 Gas OHV Bore: 1.125 In.

1 Per Vehicle

1969

 

1968

 

1967

 

1969

 

1968

 

1967

 
GMC K25/K2500 Pickup

5.0L V6 Gas OHV
1
 
Bore: 1.125 In.
 

GMC K25/K2500 Pickup



5.0L V6 Gas OHV Bore: 1.125 In.

1 Per Vehicle

1968

 

1967

 

1968

 

1967

 
GMC K25/K2500 Pickup

5.3L V8 Gas OHV,
5.7L V6 Gas OHV
1
 
Bore: 1.125 In.
 

GMC K25/K2500 Pickup



5.3L V8 Gas OHV,
5.7L V6 Gas OHV Bore: 1.125 In.

1 Per Vehicle

1967

 

1967

 
GMC K25/K2500 Pickup

4.6L V8 Gas OHV
1
 
Bore: 1.125 In.
 

GMC K25/K2500 Pickup



4.6L V8 Gas OHV Bore: 1.125 In.

1 Per Vehicle

1970

 

1970

 
GMC K25/K2500 Suburban

6.6L V8 Gas OHV
1
 
Bore: 1.125 In.
Stamped NF
w/Manual Brakes
 

GMC K25/K2500 Suburban



6.6L V8 Gas OHV Bore: 1.125 In.
Stamped NF
w/Manual Brakes

1 Per Vehicle

1970

 

1970

 
GMC K25/K2500 Suburban

6.6L V8 Gas OHV
1
 
Bore: 1.125 In.
w/Power Brakes
 

GMC K25/K2500 Suburban



6.6L V8 Gas OHV Bore: 1.125 In.
w/Power Brakes

1 Per Vehicle

1970

 

1969

 

1970

 

1969

 
GMC K25/K2500 Suburban

5.7L V8 Gas OHV,
5.7L V8 LPG OHV
1
 
Bore: 1.125 In.
Stamped NF
w/Manual Brakes
 

GMC K25/K2500 Suburban



5.7L V8 Gas OHV,
5.7L V8 LPG OHV Bore: 1.125 In.
Stamped NF
w/Manual Brakes

1 Per Vehicle

1970

 

1969

 

1970

 

1969

 
GMC K25/K2500 Suburban

5.7L V8 Gas OHV,
5.7L V8 LPG OHV
1
 
Bore: 1.125 In.
w/Power Brakes
 

GMC K25/K2500 Suburban



5.7L V8 Gas OHV,
5.7L V8 LPG OHV Bore: 1.125 In.
w/Power Brakes

1 Per Vehicle

1970

 

1969

 

1968

 

1970

 

1969

 

1968

 
GMC K25/K2500 Suburban

4.1L L6 Gas OHV,
4.8L L6 Gas OHV,
5.0L V8 Gas OHV
1
 
Bore: 1.125 In.
Stamped NF
w/Manual Brakes
 

GMC K25/K2500 Suburban



4.1L L6 Gas OHV,
4.8L L6 Gas OHV,
5.0L V8 Gas OHV Bore: 1.125 In.
Stamped NF
w/Manual Brakes

1 Per Vehicle

1970

 

1969

 

1968

 

1970

 

1969

 

1968

 
GMC K25/K2500 Suburban

4.1L L6 Gas OHV,
4.8L L6 Gas OHV,
5.0L V8 Gas OHV
1
 
Bore: 1.125 In.
w/Power Brakes
 

GMC K25/K2500 Suburban



4.1L L6 Gas OHV,
4.8L L6 Gas OHV,
5.0L V8 Gas OHV Bore: 1.125 In.
w/Power Brakes

1 Per Vehicle

1969

 

1968

 

1969

 

1968

 
GMC K25/K2500 Suburban

5.0L V6 Gas OHV,
6.5L V8 Gas OHV
1
 
Bore: 1.125 In.
Stamped NF
w/Manual Brakes
 

GMC K25/K2500 Suburban



5.0L V6 Gas OHV,
6.5L V8 Gas OHV Bore: 1.125 In.
Stamped NF
w/Manual Brakes

1 Per Vehicle

1969

 

1968

 

1969

 

1968

 
GMC K25/K2500 Suburban

5.0L V6 Gas OHV,
6.5L V8 Gas OHV
1
 
Bore: 1.125 In.
w/Power Brakes
 

GMC K25/K2500 Suburban



5.0L V6 Gas OHV,
6.5L V8 Gas OHV Bore: 1.125 In.
w/Power Brakes

1 Per Vehicle

1968

 

1968

 
GMC K25/K2500 Suburban

5.3L V8 Gas OHV,
5.7L V6 Gas OHV
1
 
Bore: 1.125 In.
Stamped NF
w/Manual Brakes
 

GMC K25/K2500 Suburban



5.3L V8 Gas OHV,
5.7L V6 Gas OHV Bore: 1.125 In.
Stamped NF
w/Manual Brakes

1 Per Vehicle

1968

 

1968

 
GMC K25/K2500 Suburban

5.3L V8 Gas OHV,
5.7L V6 Gas OHV
1
 
Bore: 1.125 In.
w/Power Brakes
 

GMC K25/K2500 Suburban



5.3L V8 Gas OHV,
5.7L V6 Gas OHV Bore: 1.125 In.
w/Power Brakes

1 Per Vehicle

1970

 

1970

 
GMC P25/P2500 Van

4.1L L6 Gas OHV,
5.7L V8 Gas OHV,
7.4L V8 Gas,
7.4L V8 Gas OHV
1
 
Bore: 1.125 In.
 

GMC P25/P2500 Van



4.1L L6 Gas OHV,
5.7L V8 Gas OHV,
7.4L V8 Gas,
7.4L V8 Gas OHV Bore: 1.125 In.

1 Per Vehicle

1970

 

1969

 

1968

 

1970

 

1969

 

1968

 
GMC P25/P2500 Van

5.0L V8 Gas
1
 
Bore: 1.125 In.
 

GMC P25/P2500 Van



5.0L V8 Gas Bore: 1.125 In.

1 Per Vehicle

1970

 

1969

 

1968

 

1967

 

1970

 

1969

 

1968

 

1967

 
GMC P25/P2500 Van

4.8L L6 Gas
1
 
Bore: 1.125 In.
 

GMC P25/P2500 Van



4.8L L6 Gas Bore: 1.125 In.

1 Per Vehicle

1969

 

1968

 

1967

 

1969

 

1968

 

1967

 
GMC P25/P2500 Van

2.6L L3 Diesel
1
 
Bore: 1.125 In.
 

GMC P25/P2500 Van



2.6L L3 Diesel Bore: 1.125 In.

1 Per Vehicle

1967

 

1967

 
GMC P25/P2500 Van

4.1L L6 Gas OHV,
4.6L V8 Gas
1
 
Bore: 1.125 In.
 

GMC P25/P2500 Van



4.1L L6 Gas OHV,
4.6L V8 Gas Bore: 1.125 In.

1 Per Vehicle

1970

 

1970

 
GMC P35/P3500 Van

4.1L L6 Gas OHV,
5.7L V8 Gas OHV,
7.4L V8 Gas,
7.4L V8 Gas OHV
1
 
Bore: 1.125 In.
Exc. 11,000 Lb. Axle
w/Bendix Brakes
w/Power Brakes
 

GMC P35/P3500 Van



4.1L L6 Gas OHV,
5.7L V8 Gas OHV,
7.4L V8 Gas,
7.4L V8 Gas OHV Bore: 1.125 In.
Exc. 11,000 Lb. Axle
w/Bendix Brakes
w/Power Brakes

1 Per Vehicle

1970

 

1970

 
GMC P35/P3500 Van

4.1L L6 Gas OHV,
5.7L V8 Gas OHV,
7.4L V8 Gas,
7.4L V8 Gas OHV
1
 
Bore: 1.125 In.
Exc. 11,000 Lb. Axle
w/Moraine Brakes
 

GMC P35/P3500 Van



4.1L L6 Gas OHV,
5.7L V8 Gas OHV,
7.4L V8 Gas,
7.4L V8 Gas OHV Bore: 1.125 In.
Exc. 11,000 Lb. Axle
w/Moraine Brakes

1 Per Vehicle

1970

 

1969

 

1968

 

1970

 

1969

 

1968

 
GMC P35/P3500 Van

4.8L L6 Gas,
5.0L V8 Gas
1
 
Bore: 1.125 In.
Exc. 11,000 Lb. Axle
w/Bendix Brakes
w/Power Brakes
 

GMC P35/P3500 Van



4.8L L6 Gas,
5.0L V8 Gas Bore: 1.125 In.
Exc. 11,000 Lb. Axle
w/Bendix Brakes
w/Power Brakes

1 Per Vehicle

1970

 

1969

 

1968

 

1970

 

1969

 

1968

 
GMC P35/P3500 Van

4.8L L6 Gas,
5.0L V8 Gas
1
 
Bore: 1.125 In.
Exc. 11,000 Lb. Axle
w/Moraine Brakes
 

GMC P35/P3500 Van



4.8L L6 Gas,
5.0L V8 Gas Bore: 1.125 In.
Exc. 11,000 Lb. Axle
w/Moraine Brakes

1 Per Vehicle

1969

 

1968

 

1969

 

1968

 
GMC P35/P3500 Van

2.6L L3 Diesel
1
 
Bore: 1.125 In.
Exc. 11,000 Lb. Axle
w/Bendix Brakes
w/Power Brakes
 

GMC P35/P3500 Van



2.6L L3 Diesel Bore: 1.125 In.
Exc. 11,000 Lb. Axle
w/Bendix Brakes
w/Power Brakes

1 Per Vehicle

1969

 

1968

 

1969

 

1968

 
GMC P35/P3500 Van

2.6L L3 Diesel
1
 
Bore: 1.125 In.
Exc. 11,000 Lb. Axle
w/Moraine Brakes
 

GMC P35/P3500 Van



2.6L L3 Diesel Bore: 1.125 In.
Exc. 11,000 Lb. Axle
w/Moraine Brakes

1 Per Vehicle