BMW DUAL VANOS O-Ring Seal Repair Kit E36 E39 E46 E53 E60 E83 E85 M52tu M54 M56 Teflon seal rings with brown viton o-rings Vanos Blind Plugs with upgraded brown Viton o-rings 11361433513 Seal Rings 14 X 20 32411093596 Vanos Unit Fit Bolts 11361748745 Gasket - Vanos/Camshaft Cover on Cylinder Head 11361433817 and Vanos Unit Piston Housing Seals When you disassemble the vanos unit to replace the piston seals there is a metal seal between the housing and the covers that bolt to the housing. I had these seals manufactured specifically for the, no one else has these seals. I felt that if someone was going to all the trouble to replace the seals it makes sense to properly re-seal the housing.