Aeromotive 99-04 GM LS1 Corvette Fuel Rail System 14128 - Each Fuel Rail System provides a custom engineered installation solution. Featuring CNC-Machined Billet Fuel Rails and custom mounting brackets as well as all the necessary components and accessories required to perform a complete installation, in one box. Fits 1999-2004 GM LS1 Corvette - Returnless System. Each Billet Fuel Rail System is comprised of: High Flow, CNC-machined, Billet Fuel Rails with custom, steel mounting brackets. Billet Adjustable Regulator or Fuel Pressure Sensor Adapter. All necessary ORB-Port fittings with O-rings, and Billet Aluminum, AN-hose ends. Stainless Steel braided fuel lines. Custom OEM fuel supply and return line adapter fittings, as required.