Fuel Rail LS Hi-Flow Holley EFI Fuel Rail LS Hi-Flow Holley EFI Fuel Rail; 5/8 in. Dia. Fuel Passage; Incl. 4 -6AN To 3/4-16 O-Ring Adapters; SPECIFICATIONS: Material: Aluminum FEATURES: With Laser Etched Logo Provides Flow Capacity For High Horsepower High Volume Fuel Passage Dampens Fuel Pressure Oscillations These Holley Terminator EFI fuel system plumbing kits provide everything needed for a complete supply fuel system for the Terminator EFI self-tuning engine management system. They are engineered using Holley electric fuel pumps, fuel pressure regulators, and fuel filters, coupled with quality Earl's hose, to provide a fuel system tailored to the needs of your Terminator EFI system. The systems are available with different fuel pumps and types of fuel hose, so you can choose what best fits your application. All Holley Terminator EFI fuel system plumbing kits feature quality Earl's Performance anodized aluminum fittings to get the job done and look good, too. Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors have powered every NASCAR Sprint Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI is dominating the performance world as well as our products for GM's LS engine. Holley's products also include performance fuel pumps, intake manifolds & engine dress-up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies - Hooker Headers, Flowtech Exhaust, NOS Nitrous, Weiand, Earl's Performance Plumbing, or Diablosport - Holley products can give you the edge you need over the competition.