Tapered fan shrouds are designed to force more air over your 3rd and 4th cylinders, which under normal conditions tend to run hotter. Steel/ Chrome shrouds are much stronger than the aluminum shrouds. Please note, you must use a external oil cooler kit with this shourd as the tapper will not allow for the stock cooler to be installed. Fits VW Bug Beetle # CPR119170-BU.