The Mishimoto 1.1 Bar Overflow Reservoir Cap is designed to support the cooling system's performance in Ford Super Duty trucks from 1999 to 2015. This cap improves system pressure control, allowing higher boiling points and better overall efficiency under load or heat stress.
Built with a secure seal and durable construction, it replaces the stock plastic cap that often weakens over time. The 1.1 bar (16 psi) pressure rating enhances coolant containment, reducing the likelihood of leaks or overheating during demanding towing or heavy-duty use. It fits precisely onto the OEM overflow reservoir, making it a direct-fit upgrade for reliability and longevity.
Key Features:
1.1 bar (16 psi) pressure rating increases boiling point for improved cooling system performance
Direct-fit replacement for OEM reservoir caps on 1999–2015 Ford F-250/F-350/F-450/F-550 Super Duty models
Durable construction ensures a secure seal under high temperatures and pressure
Ideal for heavy-duty or high-temperature environments such as towing, hauling, or off-road use
Prevents coolant loss by maintaining consistent system pressure
Replaces worn or weakened factory cap to restore proper cooling function
Corrosion-resistant materials for long-term reliability
Mishimoto Lifetime Warranty covers performance and durability
1 to 2 Business Days
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