The new Hi-Flow billet fuel rails are a direct fit for the Ford 7.3l Godzilla engines. The fuel rails feature a 5/8" diameter fuel passage that provides more flow capacity for high horsepower applications over the stock rails. The black anodized rails have -8 ORB ports on each end and an 1/8" NPT port for a fuel gauge installation if you choose to do so. • The 534-265 includes fuel rails, mounting brackets and required mounting hardware. • The 534-266 fuel rail kit includes everything from the 534-265 plus (6ft) braided hose, (4) 90 degree and (2) straight -6 hose ends.