These fuel rails are made entirely in house from a 15"x3"x2.5" piece of 6061-T6 aluminum. Each end has an 8 ORB port as well as each drill access hole for a total of six ports allowing many configurations for connections. Each injector boss is also machined to accept a retaining clip to ease installation effort and keep injectors in place. Unlike any other rail, the mounting brackets are machined into the piece to make for a one piece rail to give a complete and sleek overall look. Each set is anodized black for corrosion protection. Other colors are available for an extra cost (and extended lead time).