IAG Subaru AN-Style Thermostat Housing for 02-24 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT, 13-24 BRZ

The IAG AN Style Thermostat Housing is the perfect upgrade for those transitioning from rubber OEM Subaru hoses to aftermarket AN hoses. This precision-engineered thermostat housing is designed to replace the factory unit in the following Subaru models- 2002-2024 WRX, 2004-2021 STI, 2004-2021 STI, 2004-2013 FXT, 2005-2009 LGT and 2013-2024 BRZ. It ensures a reliable and secure connection with aftermarket AN components, while providing optimal coolant flow for your Subaru’s cooling system.

The IAG AN Style Thermostat Housing is a significant upgrade over the OEM setup, which relies on rubber hoses and standard worm-drive clamps. While the stock system is adequate for street use, it lacks the reliability needed for high-performance applications. Our AN Style Thermostat Housing ensures a leak-free, robust seal that can withstand the demands of serious builds, thanks to its superior construction and protective finish.

IAG’s AN Style Thermostat Housing is precision machined from robust 6061-T6 billet aluminum. Unlike cast aluminum, billet aluminum offers superior strength, enabling it to endure higher levels of heat, stress, and strain. This thermostat housing has a flat 2 bolt OEM-style mounting flange on one side, along with a -20 AN male threaded end on the opposite side. Additionally, the housing features a sleek black anodized finish, providing enhanced protection against corrosion.

We’re proud to say that the IAG AN Style Thermostat Housing is machined and manufactured right here in our state-of-the-art facility in Westminster, Maryland. Founded in 2007, IAG Performance has been at the forefront of Subaru performance and innovation. We offer a wide variety of problem-solving aftermarket products. Our friendly, USA based, support staff is also here to help with any installation questions you might have.