fast FAST for Red Billet Fuel Rail Kit for LS1 and LS6 LSXr 102mm Intake Manifolds Posted on December 13, 2023 by admin This Billet Fuel Rail kit for LS1 and LS6 engines includes billet fuel rails and mounting brackets designed to adapt an LS1/6 fuel injector to our 146302B 102mm intake manifold. See 146032B-KIT for black rail option. 102mm billet fast fuel intake lsxr manifolds rail