Our lightweight Proflow fuel rail Kits fit are a match for our Proflow Fabricated Intake manifolds, but deliver the increased fuel volume that your Street Rod needs for maximum performance. The 3/4 i.d. rails are precision CNC-machined from high-strength aluminium with a great looking, various finishes. The kits include fittings with Viton® O-rings for a superior seal, mounting brackets, and stainless steel hardware.