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Maintain the correct cooling system pressure for your vintage classic with this genuine Stant R-28 Radiator Cap (also known as Stant R-9). Rated at 7 PSI, this cap is designed for specific cooling systems from the late 1940s and 1950s that require a 7lb pressure rating. It features high-quality construction to prevent coolant loss and overheating.
This part is designed for the radiator filler neck on specific 1948-1957 General Motors vehicles (Buick, Chevrolet, Oldsmobile, Pontiac), 1952-1956 Ford cars and trucks, and 1952-1953 Willys Aero models.
| Make | Model | Year | Notes |
| Buick | All Models | 1948-1956 | 7 PSI System |
| Chevrolet | Passenger Cars | 1954-1957 | 7 PSI System |
| Ford | Passenger & Truck | 1952-1956 | 6 & 8 Cyl OHV |
| Oldsmobile | 88, 98 | 1949-1956 | V8 Engines |
| Pontiac | Chieftain, Star Chief | 1951-1956 | 7 PSI System |
| Willys | Aero | 1952-1953 | All Models |
1948 1949 1950 1951 1952 1953 1954 1955 1956 1957
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Please Note: All vehicle fitment data is manually researched from vintage catalogs. While we strive for accuracy, historical data can sometimes be imperfect. We strongly encourage you to perform your own due diligence by comparing our provided photos and specifications to your original part to ensure proper fitment before purchasing.