As we know the steel coolant pipes on the waterboxer engines do rust with time causing all sorts of problems. This flange is prone to rusting and has been reproduced in Stainless steel so you will no longer have to worry about replacing it again. Supplied with the necessary gasket and bolts Fits all waterboxer engines 1983-1992 Please see other T25 coolant items in the Wolfsburg Restos ebay shop.