[Application] EN-49245 EN-51105 18683AA000 18683A. Fits for GM 2.0L & 3.6L engines with for Hitachi Fuel Injectors 2010 - 2017, for GM 2.0L, 2.5L, 5.3L & 6.2L engines with for Bosch Fuel injectors 2012 - 2017, for Colorado 7 2016, for Subaru 2.0L & 2.4L turbo engines 2014 - 2019. [Function of Injector Seal Installer Adapter] For replacing the fuel injector O Ring Seals to ensure proper injector installation. Note: Seals must be installed into grooves, sized to the engineered dimension before injector are installed into bores in the cylinder head. [Detail of tools] Seal Installer Guide-Place the pilot cone on the tip of the injector and slide onto the injector tip without catching on any machines surface or incoorect groove. Install Pusher-Use the installer to push the seal into the groove of the injector. Seal Sizer-Use the sizer tool to compress the seal to the correct size for leak-free operation.