This diffuser grille installs the same as the Gen II Diffuser Grill “New Design”. The mesh from that version is replaced with some grille bars cut directly into the grille which are designed to compliment the horizontal bars of the Kooks Exhaust Grilles we also offer. As with the other design, the round hole in the center of the grille is for a backup camera and the hole size and shape can be custom sized to your camera or deleted completely if you are not using a backup camera.