With most customers jumping into doing upgraded twin turbo kits that utilize an aftermarket turbo kit the stock GTR Secondary Air System becomes a thing of the past and becomes a table weight. This is something you remove not only to save weight but also creates less clutter in the engine bay when you need room for new turbo system along with any other new mods you're adding under the engine bay. Our EGR Plates are CNC Billet 6061 Aluminum and retain the factory hardware and gasket that comes standard on the vehicle. Once the factory bypass system is removed you will then have to remove the DTC codes that will become active when the car is powered back on. All can be done by the COBB handheld and Cobb certified tuner.