PFF5-1322 Gearbox Mounting Bush Insert is made using Yellow 70A 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.  PFF5-1322  Gearbox Mounting Bush  Insert  is made using  Yellow  70A  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.