2 pieces of hardlines custom made to bolt on adjustable Wilwood proportion valve2 pieces of hardlines custom made to bolt on adjustable Wilwood proportion valve These 2 hardlines are custom made so you can bolt on a Wilwood adjustable proportion valve into your Nissan Datsun brake hardline system. These are required on all Japanese cars because the prop valve will leak fluid without these hardlines in between. Each line has a bubble flare and inverted flare on each side. This listing is for 2 pieces of hard lines, One pieces is