PFF5-5452BLKEngine Mount Insert uses the same design as the Road Series part but with our 95A Black Series material to provide uncompromisedengine stability. Mount rigidity is increased by a huge 180%.An increase inNVH, usually at idle, should be expected when stiffening the connecting mount between the engine/transmission and chassis. The harder the material used, the greater the NVH transmitted. Fits 3.0ltr B58 engines only.