BLOX Racing’s EGR Block-off is CNC-machined from billet aluminum and is designed to eliminate the OEM EGR system. By eliminating the exhaust gas recirculation that is dumped back into the cylinders, the engine runs cooler overall. In addition, less carbon is deposited which is commonly associated with stuck valves. CNC-machined billet aluminum Anodized for durability Simple installation  Features 2x billet block-off plates 1x EGR gasket 2x 90-degree fittings ECU TUNE REQUIRED Vehicle Applications 2015+ Subaru WRX 2014+ Subaru Forester XT