Coolant Expansion Tank

The Spelab SPCS08748 is a premium coolant expansion tank engineered as a direct replacement for the 2002-2007 Subaru WRX and 2004-2016 Subaru STI models. It addresses common issues with the factory plastic reservoir, such as becoming fragile, hazy, and prone to leaks, which can obstruct coolant level visibility. Constructed from robust 6061 aircraft-grade aluminum, this tank is built for durability and longevity. It features TIG welding and undergoes pressure testing to ensure maximum strength and a leak-free seal. The aluminum material also offers superior heat dissipation compared to plastic, potentially improving overall system performance and extending the life of cooling components. Installation is designed to be straightforward, requiring only basic tools and approximately 30 minutes to complete. The fabrication process is distinct from the stock tanks, which often consist of two sealed plastic pieces, thereby eliminating stress points that can lead to cracking and leaks. Each unit is manufactured at SPELAB's facility, adhering to stringent quality control measures from cutting to welding, to ensure years of reliable performance. The SPELAB Coolant Reservoir Tank is specifically designed to fit the 2002–2007 Subaru WRX and 2004–2016 STI.