1987 through 1989, Porsche changed the transmission to a better unit, called a g-50 . The leather on these were very thin and wear out quickly, especially lighter colors such as linen and camel. These replacement boots uses thicker leather to avoid this problem. Please indicate color when ordering; black will be the default color. Specify 4 or 5 speed emblem when ordering. This part has a 2-3 week lead time.