These snorkels are made out of 4" stainless steel all tig welded together. With a vairity of finishes from brushed raw stainless steel to gloss or matt black and the customazability of our bolt on end caps offering our branded end cap along with td5, tdi and other options. These snorkels come with a stainless hard pipe allowing them to be connected to the factory air box. They are also compatible with our aftermarket 300tdi air boxes