

🚗 Stop Confidently, Drive Boldly – The Master Cylinder That Means Business
The Gold 18M1878 Brake Master Cylinder Assembly by ACDelco combines cast iron and aluminum for durable, stress-free mounting. Engineered to meet SAE J1153 and J1154 standards, it is pressure tested to ensure safe, reliable braking. Featuring precision fit and pre-assembled design, it prevents brake drag to extend pad life and installs quickly for professional-grade performance.










| ASIN | B001DRNA1U |
| Best Sellers Rank | #77,888 in Automotive ( See Top 100 in Automotive ) #78 in Automotive Replacement Brake Hydraulic Parts |
| Brand | ACDelco |
| Customer Reviews | 4.6 4.6 out of 5 stars (825) |
| Date First Available | October 10, 2007 |
| Exterior | Machined |
| Item Weight | 1.4 pounds |
| Item model number | 18M1878 |
| Manufacturer | ACDelco |
| Manufacturer Part Number | 19176488 |
| Model | Brake Master Cylinder Assembly |
| OEM Part Number | 19176488 |
| Product Dimensions | 9.4 x 5.8 x 4.8 inches |
J**N
Solid brakes
Perfect fit. Works well. No issues at all. Installed on 77 K10
C**I
Good quality
Good quality and price
C**Y
Works good 64 Chevelle
Worked good in my 64 chevelle with a disk brake conversion. Not sure what year the conversion was from but I took a shot with this because the bore diameter didn’t change much for like 20 years.
J**A
Excelente
Excelente
H**Y
Brakes work good
The build quality seems to be very good and fits well. Good value for the money and functions like it should.
A**R
Works good.
Works good in 1979 camaro.
M**.
Perfect fit and performance
Item arrived quickly. It was a direct replacement for 1977 Pontiac Firebird. Easy install and works perfectly. Instructions are included for bench bleeding.
N**.
It fit as it should
Fit well. Looks to be good quality. Had no issues bleading at all. Bench bled very easily.
R**R
Cette pièce était nécessaire pour moi ,, car cette pièce sert a appliqué les freins d'un véhicule, les prix est excellent, la piece est complètement neuve et le service est impeccable
F**Z
La pieza llegó a tiempo y es el reemplazo correcto para camioneta GMC 1977 con Booster. El producto es AC Delco original pero fabricado en china. Lo devolví porque antes de que llegara encontré otro en una refaccionaría local a mejor precio y fabricado en México, así que devolví el de Amazon sin instarlo, usarlo o probarlo, así que no puedo opinar de su funcionamiento.
A**I
Best product as described
A**R
I used this on my 1976 Pontiac Astre, fit perfect.
M**K
Perfect thank
Trustpilot
2 months ago
2 weeks ago