Mishimoto 1.1 Bar Rated 99-15 Ford F-250/F-350/F-450/F-550 Super Duty Overflow Reservoir Cap

When you're pushing your Ford Super Duty truck or van hard, especially in demanding conditions, the cooling system works overtime. The factory overflow reservoir cap is designed for everyday driving, but under high pressure, it can lose its seal. This Mishimoto 1.1 Bar Overflow Reservoir Cap is built to hold that pressure, keeping your coolant contained and at the right temperature. It's a small part that makes a big difference in preventing overheating and potential cooling system failure.

This cap is rated at 1.1 Bar, which is about 16 psi. Raising the pressure in your cooling system also raises the boiling point of your coolant. This means your coolant can handle higher temperatures before it starts to boil, which is crucial for keeping your engine running cool when it matters most. Mishimoto designed this cap to be easy to remove and install, so you can swap it out quickly. It fits a wide range of Ford vehicles, including many F-250, F-350, Crown Victoria, and E-Series vans from the late 90s through the mid-2010s.