Powerflex PFF44-105 Front Upper Engine/Trans Mount (Track)Powerflex PFF44 105 Front Upper Engine Trans Mount (Track) Part Number: PFF44 105 Product Notes (if required): This bush fits both the Upper Engine and Gearbox Mount positions. PFF44 105 is made in our Purple 80A material and recommend for track use. 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