PFF5-1322BLK Gearbox Mounting Bush Insert is made using Black 95A durometer material. It has been designed to fill the voids in the OE mount for an effective and affordable solution to stiffening the original rubber. It will not fit the GP3 model.  As the vehicles age and simple upgrades seeing  the  2-ltr  turbo engine push power north of 250bhp, the OE rubber  engine and transmission mounts are showing their age, with cracked rubber and  excessive movement.  PFF5-1322BLK Gearbox Mounting Bush  Insert  is made using  Black 95A  durometer  material and has been designed to fill the voids in the OE mount for an  effective and affordable solution to stiffening the original rubber.