PFF60-8025P is a further 20% stiffer than PFF60-8025 being made solely in our Purple 80A durometer material and is recommended for more heavily tuned road or occasional track cars. A small increase in NVH, usually at idle should be expected when stiffening the connecting mount between the engine/transmission and subframe. For an insert only use PFF60-820 (only fits pressed, rubber-coated OEM mount).
