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Upgrade the overworked factory intercooler on your 2015-2021 WRX or STI with the COBB Front Mount Intercooler Core. This core-only option is ideal for those who already have piping or plan to custom-route it. Featuring a massive 24"x11"x4" bar-and-plate design, the core is finished in a Silver heat-dissipating coating to maximize cooling efficiency.