Remove the two bolts that secure the EGR to the intake manifold. Carefully remove the old gasket. Use this as a templat and trace the outline of the gasket and bolt holes on a piece of thin stainless steel. When finished your restrictor will be just like the gasket, except solid. Trim the outside of the plate with a pair of tin snips. Drill the bolt holes out with a drill. Use a little silicon sealant (form-a-gasket)to get a good seal. Slip the plate in place of the gasket and reenstall the two bolts. Go for a test drive and see if it runs any better.