PFF5-224BLK is made from our stiffest 95A Black Series material, providing a no-compromise performance option for track-focused builds. A small increase in NVH, 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. Complimenting products such as PFF5-220 and PFF5-225, our new PFF5-224 Upper Engine Mount Insert is designed to fill the void in the OE rubber upper engine mount to restrict movement.The original rubber engine mount softens and perishes with age, losing its ability to dampen effectively and promoting unwanted engine movement. By fitting our new insert, it acts as a buffer by restricting movement within the bush thus improving throttle response, sharpening gear changes, and reducing wheel hop for improved traction. The bush requires no pressing or burning, simply peen the insert into position and refit the mount!