EMPI s Aluminum Vertical Oil Filler with Grooved Cap threads into the generator or alternator stand on Type 1 and 2 upright engines. The vertical position of the oil filler makes filling the engine with oil much easier. The filler is made from 6061 T-6 aluminum and fully polished. A 1/4 NPT - 1/2 barbed breather hose fitting. A billet aluminum cap threads on to the top of the filler and is grooved for to make installation and removal simple.Angled Oil Filler Extension With Grooved Cap Fits VW