PFF85-620R is made using our Red 65A durometer material and is suitable for standard diesel vehicles only. For tuned diesel vehicles or petrol models use PFF85-620. For track/heavily tuned models use PFF85-620P. Fitting this engine mount bush to 1.4 TDI 3 cylinders is not advisable. 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.