Good quality reproduction product. T2 vacuum unit. If the the vacuum unit is faulty on your engine, it can lead to rough running as if it is not advancing or regressing the timing as it should it will lead to a lack of power. The solution is to replace the vacuum unit and this new unit.
Fits VW T2 Bays with AD and AS engines, VW T25 / T3 1900 DG and SP 1982 to 1992 1600cc CT engines.