Genuine Mopar 77043 Master Cylinder Piston Cup (NOS)
This genuine Mopar 77043 master cylinder piston cup is a critical New Old Stock (NOS) brake component designed for the restoration of early Chrysler Corporation braking systems. Proudly Made in the USA, this high-quality rubber cup is the factory-correct internal seal for master cylinders on 1928–1941 Dodge, Plymouth, Chrysler, and DeSoto passenger cars and trucks. Using authentic NOS components ensures proper hydraulic pressure and original factory sealing performance that modern generic reproductions may not match, making it an essential part for maintaining the safety and functional integrity of your vintage Mopar restoration.
Key Features:
- Brand: Mopar
- Part Number: 77043
- Position: Master Cylinder
- Engine Fitment: All Engines
- Origin: Made in USA
- Condition: NOS (New Old Stock)
Verified Vehicle Fitment:
| Make |
Model |
Year |
Notes |
| Chrysler / Dodge |
All Models |
1928-1941 |
Fits Master Cylinder assemblies |
| Plymouth / DeSoto |
All Models |
1928-1941 |
Fits Master Cylinder assemblies |
Fits Years:
1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941
Actual Item Photos: Please look over the pictures carefully, as they depict the exact item you will receive. We utilize high-resolution photos of our current physical inventory rather than generic stock images so you can verify the specific condition, markings, and authenticity of this vintage part prior to purchase.
A Note on Fitment Accuracy: We manually research and cross-reference our fitment data using vintage manufacturer catalogs. While we strive for 100% accuracy, these decades-old resources—and the humans reading them—can occasionally contain errors. Additionally, these parts may fit other vehicles and years not explicitly listed in our data. To ensure a seamless restoration, we kindly ask that you perform your own due diligence and verify that this specific part number is correct for your application prior to purchase.
Unbeatable Prices & Expectations
As with all vintage New Old Stock (NOS) parts, this item may show "shelf wear" such as light surface oxidation, dust, or minor finish imperfections from decades of storage in original packaging. These characteristics are typical of authentic vintage components and do not affect the functionality of the part. Our pricing reflects the rarity and historical value of these original American-made treasures.
