If you choose not to use the exhaust - perhaps you're planning on fitting a nevermore instead. This is a blanking plate with integrated bowden tube route that goes in place of the exhaust filter housing. It makes use of the existing grill with one strut removed (use the stl here or cut out a strut of a grill you already have printed) as I liked the look of it.
Ignore the missing m3 screws holding the grill in place, it's because the led bar interferes.