IAG Subaru AN-Style Thermostat Housing for 02-24 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT, 13-24 BRZ | IAG-ENG-2040 CivicSi_2012-2015 12-point head design and larger

12-point head design and larger than stock shank diameter for increased strength and improved flywheel register

No modifications are needed as it is a direct bolt-on unit to the OEM exhaust cat-back location

The linear spring rate offers a predictable and controllable ride while offering a modest increase in spring rate to reduce body roll and provide better handling characteristics

The kit features mandrel-bent aluminum intercooler piping

Part #: 196440

IAG Subaru AN-Style Thermostat Housing for 02-24 WRX, 04-21 STI, 04-13 FXT, 05-09 LGT, 13-24 BRZ | IAG-ENG-2040 CivicSi_2012-2015 12-point head design and largerThe 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