MSD'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" diameter fuel passage that provides the flow capacity necessary to fuel high horsepower applications making them the perfect match for your Atomic AirForce intake manifold.