Billet Aluminum Thermostat Housing

The German Performance Solutions Audi 3.0T Gen 1 Billet Aluminum Thermostat Housing is engineered to replace the failure-prone factory plastic unit found in Audi's supercharged TFSI engines. Designed as a direct OEM replacement, this housing utilizes aerospace-grade 6061-T6 billet aluminum with a hard anodized finish, offering enhanced durability and resistance to cracking, warping, and coolant leaks that plague the stock component (OEM part 06E121111AL). This Version 2 housing features two key upgrades: it resolves overcooling issues reported in colder climates and repositions assembly screws outside the O-ring groove to prevent hardware from entering the engine block during installation. It is available as a "Thermostat Housing Only" option for those using aftermarket thermostats or as a "Complete Thermostat Assembly" that is pre-assembled and ready for installation. The housing is precision-engineered in the USA and is a direct bolt-on replacement. It is compatible with OEM and aftermarket thermostats and includes all necessary gaskets and hardware when purchasing the complete assembly. Compatible engine codes include CAKA, CCAA, CCBA, CCDA, CGWA, CGWB, CGXC, CRED, CREC, CTUA, and CTUB. The thermostat housing is designed for Audi 3.0T Gen 1 Supercharged TFSI Engines and fits various models including A6 C7 (2012-2018), A7 C7 (2012-2018), A8 D4 (2011-2017), Q5 B8 (2009-2017), Q7 4L (2007-2015), S4 B8 (2009-2016), S5 B8 (2009-2016), SQ5 B8 (2014-2017), and VW Touareg 3 (2011-2016) Hybrid models.