Adapt your existing Tacoma X1 to fit your new Gen 4! Kit includes: Cabside adapter flange Hardware Replacement bulb seal Replacement tailgate cap Install Instructions Does not include butyl or tailgate flange if required. If you are moving from a G2 to G4, you will need THIS (Gen 4 - Standard) flange in addition to the retro kit. Please allow at least 5 business days prior to shipment.