Atomic EFI Billet Fuel Rails Billet Aluminum Fuel Rail Kit For Use On Gen-V Lt1 Atomic Airforce Intake Manifolds. Fits Manifold Part Numbers 2700, 27003 And 27004 MSD IgnitionMSD's new Atomic EFI billet fuel rails enhance the great looks of your Atomic AirForce intake manifold. Available as rails only, or as complete kits that include all necessary plumbing, these fuel rails are a perfect addition to your engine bay. The bright dip, black anodized finish with laser etched logos will look great for years. MSD Atomic fuel rails feature a 5 8 Inch diameter fuel passage that provides the flow capacity necessary to fuel high