Mishimoto Thermostat for 1999-2003 Ford F-250 Super Duty 7.3L 4R100

Mishimoto Thermostat for 1999–2003 Ford F-250 Super Duty 7.3L (4R100) Upgrade cooling reliability with the Mishimoto thermostat engineered specifically for 1999–2003 Ford F-250 Super Duty 7.3L engines paired with 4R100 transmissions. Designed to deliver consistent engine temperature control, this thermostat helps improve warm-up times, reduce overheating risk, and maintain optimal performance under heavy loads. Key Features Direct fit for 7.3L Power Stroke F-250 applications — seamless installation without modification. Durable construction with corrosion-resistant materials for long service life in harsh trucking conditions. Precise calibration for accurate opening temperature to protect the engine and improve fuel efficiency. OEM-quality performance backed by Mishimoto engineering and testing standards. Benefits Faster, more reliable warm-up and stable operating temperature under towing or heavy-duty use. Reduced wear on engine components by preventing prolonged overheating or overcooling. Easy replacement part for routine maintenance or cooling system upgrades. Fitment note: Designed primarily for 1999–2003 Ford F-250 Super Duty 7.3L models (see application guide for full compatibility across trims and transmission types). Replace your thermostat with Mishimoto quality to keep your Super Duty running cooler and longer.