This a Cast Aluminum direct replacement for fail in the Coolant Flange (06A121132AP) causing coolant leaks on 1.8T engines. These parts were designed for years of trouble free use. We also sell all of the other Cast Aluminum replacement coolant flanges in our store either as a Upgrade Kit (4 pcs.) or individually. Mates to the the factory hoses for a perfect OEM fitment.Parts are also available by individually or as an Upgrade Kit in my eBay store.Fits: 2000-2005 Mk4 Golf/Jetta 1.8T, 2000-2002 Audi TT*Does not fit ANY New Beetles