Eliminate cooling system weak points with the SWAG Performance Billet Thermostat Housing & 205° Thermostat Kit, a complete reliability and performance upgrade for 1999–2003 7.3L Powerstroke engines. This all-in-one solution replaces the rust-prone factory thermostat housing and thermostat with premium components engineered for long-term durability, consistent operating temperatures, and leak-free performance.
Factory stamped steel thermostat housings are notorious for corrosion, warping, and poor sealing — often becoming unusable once removed. SWAG Performance solves this problem with a CNC-machined billet aluminum thermostat housing, paired with a 205°F high-quality thermostat that maintains proper diesel operating temperature under all driving conditions.
? Billet Aluminum Thermostat Housing
Precision-machined from solid billet aluminum, the SWAG Performance housing eliminates the flex, rust, and flange distortion common with OEM stamped housings. The rigid design maintains a flat sealing surface even after repeated heat cycles, allowing the housing to be reused during future maintenance.
Finished in a durable black anodized coating, it provides excellent corrosion resistance while delivering a clean, performance-focused engine bay appearance.
?️ 205°F Thermostat — Optimized for Diesel Efficiency
The included 205°F thermostat is specifically chosen to support the operating characteristics of diesel engines. Higher coolant temperatures improve combustion efficiency and help the 7.3L Powerstroke operate as intended by the factory calibration.
Benefits of a higher-temperature thermostat in diesel engines include:
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Improved fuel combustion efficiency
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More stable cylinder temperatures under load
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Reduced carbon buildup and incomplete combustion
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Better heater output in cold climates
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Faster warm-up times and consistent operating temperature
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Proper PCM fueling strategy and sensor feedback
Unlike lower-temperature thermostats that can cause poor fuel economy, excessive smoke, and inconsistent engine behavior, the 205°F thermostat keeps the engine in its optimal thermal range — especially important for towing, daily driving, and cold-weather operation.
Upgrade once. Fix it for good.
The SWAG Performance Billet Thermostat Housing & 205° Thermostat Kit delivers long-term durability, stable operating temperatures, and the reliability your 7.3L Powerstroke Diesel deserves.
