PFF1-1130RLower EngineMountInsertis made in our softestRed 65Adurometer material, specifically for Diesel models, helping tolimit NVH transmission. Designed to fillthe voiding in the OE rubbermount, it smooths out gear changes by stiffening and supporting the often perished rubber bush, that is common for failure on tuned vehicles. This will provide a more precise and settled transmissionresponse during acceleration anddeceleration. A small increase in NVH, usually at idle, should be expected whenstiffening the connectingmountbetween the engine/transmission and chassis.The harder the material used, the greater the NVH transmitted.