These Exhaust Grille pieces are the same size and shape as the perforated mesh pieces that are provided with the GTM kit and use the same methods for installation.  These Exhaust Grilles are designed with a built-in “trim ring” for the FFR round exhaust tips and also offer much more area for airflow over the FFR mesh.  The opening for the exhaust tip offers 5/8″ clearance all the way around the exhaust tip to allow for engine/exhaust movement.  Parts are made from .080″ aluminum and ship flat as pictured.  Please note:  The photo below of the installed parts is with a Kooks exhaust.  These parts are for the FFR supplied exhaust and the look and function will be similar.  Also, the photo of the flat parts shows the openings biased up from center.  I also have these parts available with the exhaust openings centered vertically on the parts.